[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
[Expired for dnsmasq (Ubuntu) because there has been no activity for 60
days.]
** Changed in: dnsmasq (Ubuntu)
Status: Incomplete => Expired
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Expired
Status in systemd package in Ubuntu:
Invalid
Bug description:
[Triage Notes]
"Incomplete" in dnsmasq: may be a valid bug, but developers cannot make
progress until someone can provide steps to reproduce. See comment 55.
[Original Description]
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bi
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
please reopen if this is still an issue
** Changed in: systemd (Ubuntu)
Status: Confirmed => Invalid
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Incomplete
Status in systemd package in Ubuntu:
Invalid
Bug description:
[Triage Notes]
"Incomplete" in dnsmasq: may be a valid bug, but developers cannot make
progress until someone can provide steps to reproduce. See comment 55.
[Original Description]
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Same issue on Ubuntu 18.4, that occurred after system startup.
Linux ali-GE620DX 4.15.0-51-generic #55-Ubuntu SMP Wed May 15 14:27:21
UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Incomplete
Status in systemd package in Ubuntu:
Confirmed
Bug description:
[Triage Notes]
"Incomplete" in dnsmasq: may be a valid bug, but developers cannot make
progress until someone can provide steps to reproduce. See comment 55.
[Original Description]
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Hi Jasem,
it seems you are hitting a similar but not the necessarily same issue.
As outlined before all discussions here ended as incomplete unable to be
actioned and needs clear steps to reproduce to continue.
I'd ask you to file a new bug for your case and there provide as much
info as possible how to recreate your case.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Incomplete
Status in systemd package in Ubuntu:
Confirmed
Bug description:
[Triage Notes]
"Incomplete" in dnsmasq: may be a valid bug, but developers cannot make
progress until someone can provide steps to reproduce. See comment 55.
[Original Description]
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
I'm affected by this bug, but using dnsmasq-base employed by
NetworkManager and not dnsmasq package. The dnsmasq is what is consuming
one core of the CPU 100% after a few minutes, not systemd-resolved.
After heating the CPU for a few minutes, it drops again and the cycle
repeats after a while. I keep seeing these errors:
Maximum number of concurrent DNS queries reached (max: 150)
failed to send packet: Resource temporarily unavailable
This is on a fresh 18.04 installation, not an upgrade.
--
You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Incomplete
Status in systemd package in Ubuntu:
Confirmed
Bug description:
[Triage Notes]
"Incomplete" in dnsmasq: may be a valid bug, but developers cannot make
progress until someone can provide steps to reproduce. See comment 55.
[Original Description]
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANG
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
For other souls facing this "Medium" issue,
a hammer-ish workaround that works for me:
1) Run:
apt-get install cpulimit
2) edit /lib/systemd/system/systemd-resolved.service:
2a) Comment out:
#Type=notify
2b) Replace line (may want to remove the -k to let cpulimit throttle it):
#ExecStart=!!/lib/systemd/systemd-resolved
ExecStart=!!/usr/bin/cpulimit -f -q -k -l 50 -- /lib/systemd/systemd-resolved
3) Run:
systemctl daemon-reload
systemctl restart systemd-resolved
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Incomplete
Status in systemd package in Ubuntu:
Confirmed
Bug description:
[Triage Notes]
"Incomplete" in dnsmasq: may be a valid bug, but developers cannot make
progress until someone can provide steps to reproduce. See comment 55.
[Original Description]
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=x
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
>From the above comments I think it's clear that the problem is caused by
some kind of misconfiguration resulting in a loop. It isn't clear if
that misconfiguration is coming from a user error or from some bug in an
upgrade path somewhere. If the latter, then it's a valid bug. However,
since we don't have steps to reproduce the problem, I'm marking this bug
as Incomplete in dnsmasq, to make it clear that developers aren't
expected to be able to make any progress on this problem until someone
can provide steps to reproduce.
** Changed in: dnsmasq (Ubuntu)
Status: Confirmed => Incomplete
** Description changed:
+ [Triage Notes]
+ "Incomplete" in dnsmasq: may be a valid bug, but developers cannot make
progress until someone can provide steps to reproduce. See comment 55.
+
+ [Original Description]
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like starting
the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Also happening to me after 16.04 -> 18.04 LTS upgrade (via do-release-
upgrade)
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packa
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
There is some configuration that leads to a loop between these two
resolvers, and that is what causes the cpu usage. If we could get a step
by step way to reproduce it, it could probably be addressed.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
This annoying bug affected all upgrades to Bionic and Cosmic Cuttlefish
I did so far and also effects Cosmic Cuttlefish. systemd-resolv and
dnsmasq consume each 100% CPU and internet access becomes extremely
slow.
My latest workaround is to disable automatic overwriting to
/etc/resolf.conf with sudo dpkg-reconfigure resolvconf, and to replaced
the spurious nameserver 127.0.01 in /etc/resolv.conf with nameserver
8.8.8.8
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
Upgrade
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
I have this on Ubuntu 18.04. In my case I use dnsmasq with a custom
configuration providing DHCP and DNS to multiple bridges (Virtual
Machines and containers). So I need them both (in so far as I need
dnsmasq and am being forced to use systemd).
The problem is a DNS loop between systemd and dnsmasq. systemd-resolved
forwards DNS queries in parallel to entries in /etc/resolv.conf and
servers picked up from interfaces via DHCP. If you, like me have dnsmasq
in resolv.conf, and a dnsmasq configuration that forwards to systemd,
then you have a loop.
My work-around is to add `DNS=127.1.1.1` into
/etc/systemd/resolved.conf. Nothing is listening on 127.1.1.1 so the
queries go unanswered. The systemd resovler gets answers only from
servers provided to me via DHCP or statically assigned to an interface.
Inside my dnsmasq.conf I have `server=127.0.0.53`, and resolv.conf has
`nameserver 127.0.0.1` which is dnsmasq.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
I also had this issue after upgrading to 18.04. During the upgrade, I
got asked if I wanted to keep or replace my /etc/dnsmasq.conf, I opted
to replace with the package maintainer's version. The old config file
had the option interface=enp0s25, the new one does not. I don't
know/remember where this option came from. Could this be related?
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
I also think it's an upgrade artifact. It happened on my upgraded laptop but
not in the freshly installed desktop machine.
The problem in the laptop now (I think) hostapd that requires dnsmasq.
The workaround cited by @ahasenack in #49 seems to work.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name:
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
I don't know what is the use case you guys have that you have to have
dnsmasq and resolvconf installed. Maybe there is none and this is just
an artifact from a release upgrade.
In Bionic, I only have dnsmasq-base (not dnsmasq) installed, and no
resolvconf.
Looking at the initscript from dnsmasq, there seem to be a few options to
disable it for local dns resolving, like the one suggested in
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1670959/comments/32,
which I reproduce below:
Added this line to /etc/default/dnsmasq:
DNSMASQ_EXCEPT=lo
Then restarting dnsmasq:
sudo systemctl daemon-reload
sudo systemctl restart dnsmasq
That will prevent the code quoted in
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1670959/comments/47 from
running.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
It seems to be dnsmasq itself:
/etc/init.d/dnsmasq:163:echo "nameserver 127.0.0.1" |
/sbin/resolvconf -a lo.$NAME
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.c
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
And looks like we need to find out what is adding 127.0.0.1 to
resolv.conf. It could come from many different sources, like a
nameserver configuration in some /etc/network/interfaces carried over
from xenial, or something in network-manager, etc. I guess you could
start with a brute-force grep -r on /etc for 127.0.0.1?
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: He
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
What do you guys have inside /etc/resolvconf? In terms of directories,
files, and their contents.
Do you have the resolvconf package installed by any chance?
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.a
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
This solution works, but it's not persistent. /etc/resolv.conf is a symlink to
/run/resolvconf/resolv.conf, which is ephemeral. It'll be recreated as
127.0.0.1.
Any news on an actual fix for this, rather than just a workaround?
Thanks!
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
I just started noticing this issue on my machine today. Ubuntu 18.04. I
also had nameserver 127.0.0.1 in /etc/resolv.conf. Changed to
127.0.0.53, per diepes' comment and CPU calmed down for me as well.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
This happened on my machine, and diepes's fix worked for me as well.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.mo
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
@diepes, interesting. Looks like there was a loop going on there.
Can everybody please check their /etc/resolv.conf to see if something
similar might be happening with it?
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Ubuntu 18.04.
edited $sudo vim /etc/resolv.conf
changed
nameserver 127.0.0.1
to
nameserver 127.0.0.53
CPU calmed down.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chass
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
I also trying confront with this problem, but there is no solution at all. I
tried to disable the systemd-resolved service but after that my domain resolver
stop working and I lost access to webpages. I also have dnsmasq. I don't know
why but I think this service is come from Ubuntu 16.04.
I upgraded my Ubuntu from 16.04 to Ubuntu 17.10 and then upgrade it to 18.04.
Maybe this is why the problem is created.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Up
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Just to chime in: Noticed slow machine and systemd-resolved taking 100%
cpu. Edited /etc/systemd/resolved.conf to DNSSEC=no (not off, as "no"
was commented out in the file). Tried systemctl restart systemd-
resolved, but nothing changed. Tried killall systemd-resolved, nothing.
Tried killall -9, and it respawned a well-behaved process. I recently
installed dnsmasq when my computer failed to resolve anything. This is
a fairly up-to-date Ubuntu 17.10.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
same issue with 17.10, takes a complete core,
DNSMASQ_EXCEPT=lo is not working, also after reboot, it still takes a core
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.typ
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Adding
DNSMASQ_EXCEPT=lo
to
/etc/default/dnsmasq
solves the problem in my case, kubuntu 17.10, kernel 4.15.rc7,
for several days now.
Peter
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
** Tags added: indeed
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvrM77Ver.01.05
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Maybe interesting things to note:
1. When in bad state:
- The mentioned ENV var change in /etc/default/dnsmasq and `sudo systemctl
restart dnsmasq` immediately resolves the issue
2. When in good state:
- Commenting out the ENV var and running `sudo systemctl restart dnsmasq`
does not immediately re-cause the issue
- After a reboot, the bad state can be observed again (systemd-resolved using
100% of a CPU core)
Maybe there is an order of operations thing here?
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro roo
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Christian: I've tried as I believe you have asked.
When in the bad case (I comment out the line: DNSMASQ_EXCEPT=lo and then
reboot):
- Running this did not resolve the issue: `sudo resolvconf -a lo.dnsmasq`
- Running this did not resolve the issue: `echo "nameserver 127.0.0.1" |
/sbin/resolvconf -a lo.dnsmasq`
So far only the DNSMASQ_EXCEPT=lo line in /etc/default/dnsmasq appears
to resolve the issue.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgrad
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Interesting James,
so there is a little twist that might be related and lead to a resolution.
Usually the service of dnsmasq would add itself to the resolvconf server set.
It does so in:
start_resolvconf()
{
# If interface "lo" is explicitly disabled in /etc/default/dnsmasq
# Then dnsmasq won't be providing local DNS, so don't add it to
# the resolvconf server set.
for interface in $DNSMASQ_EXCEPT
do
[ $interface = lo ] && return
done
# Also skip this if DNS functionality is disabled in /etc/dnsmasq.conf
if grep -qs '^port=0' /etc/dnsmasq.conf; then
return
fi
if [ -x /sbin/resolvconf ] ; then
echo "nameserver 127.0.0.1" | /sbin/resolvconf -a lo.$NAME
fi
return 0
}
So I wonder if that "not adding to resolvconf is the actual way this is
fixed for you per https://askubuntu.com/a/968309/
So while the config says "do not server lo", what it really does to fix
your case is not adding it. That in turn one could test.
So once you are in the bad case could you try if
$ resolvconf -a lo.dnsmasq
would resolv the issue as well?
I currently fail to grasp all the potential regressions that change could have,
but I'd think that knowing if
a) not serving on 127.0.0.1
or
b) not registering in resolvconf
is the actual trigger might help someone else to go further.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing qu
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Also seeing this issue in Ubuntu 17.10 (artful) with:
dnsmasq-base 2.78-1
systemd 234-2ubuntu12.1
I can confirm that following https://askubuntu.com/a/968309/ resolves
the issue!
Steps to fix the issue:
Added this line to /etc/default/dnsmasq:
DNSMASQ_EXCEPT=lo
Then restarting dnsmasq:
sudo systemctl daemon-reload
sudo systemctl restart dnsmasq
No more systemd-resolved taking 99-100% of a CPU core!
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
Up
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Is there an official solution yet? BTW https://askubuntu.com/a/968309/
seemed to help me out.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor:
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
@ Michael Roth (mdroth)
On zesty and later /etc/resolv.conf must not list "nameserver 127.0.0.1" this
seems to be broken configuration state.
I am concerned how you got into such a state. Is your network managed by
ifupdown with /etc/network/interfaces or NetworkManager? do you have resolvconf
installed? What is the output of $ NetworkManager --print-config | grep dns ?
@tomposmiko
$ systemctl disable systemd-resolved
$ systemctl stop systemd-resolved
$ systemctl mask systemd-resolved
$ apt remove --purge libnss-resolve
Should do it. Then you should still have resolvconf & ifupdown installed, or
resolvconf+dnsmasq+NetworkManager installed. Or without resolvconf manage
/etc/resolv.conf by hand.
Note such system configurations may not be fully supported, but should be
operational for simplistic networking setups.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
hi All,
Is it possible to eliminate systemd-resolved from the system?
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Hi Michael,
I'm certainly the least expert in this case - I was just trying to help mapping
that other case I have seen.
Your ouput tells (me oO) that your resolvd talks to:
1. a link scope DNS 192.168.2.254 on wlp4s0
2. is set up to talk to a gloabl dns at 127.0.0.1
IIRC it will ask both and whoever answers first is the reply it gives
(can be bad at times if the nack of server A is faster than the detail
from server B).
On 127.0.0.53 that is resolvd itself listening.
The libvirt dnsmasq usually has "except-interface=lo" so it should not listen
on 127.0.0.1.
The case I mentioned in c#25 was a manual config change that made resolved call
the dnsmasq causing the loop.
I agree that you can't easily derive if you are "looped" now from the output
you have.
Maybe you could check in your case if/who does listen on 127.0.0.1:53?
$ sudo netstat -ltaupn | sed -rne 2p -e '/:53\b/p'
Does libvirt know the pid of the dnsmasq it spawned, maybe this can be used to
make this check more find grained?
Like "is any of our pids binding :53 on something in systemd-resolved --status"
maybe.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsm
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
@ChristianEhrhardt: I'm not sure how to determine whether systemd-
resolver is forwarding back to dnsmasq, hopefully it's clear from the
output:
mdroth@sif:~$ cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 127.0.0.1
mdroth@sif:~$ ps aux | grep dnsmasq
dnsmasq 1122 1.6 0.0 55276 2864 ?SSep18 10:11
/usr/sbin/dnsmasq -x /run/dnsmasq/dnsmasq.pid -u dnsmasq -r
/run/dnsmasq/resolv.conf -7 /etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new
--local-service
--trust-anchor=.,19036,8,2,49AAC11D7B6F6446702E54A1607371607A1A41855200FD2CE1CDDE32F24E8FB5
libvirt+ 1794 0.0 0.0 52380 396 ?SSep18 0:00
/usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf
--leasefile-ro --dhcp-script=/usr/lib/libvirt/libvirt_leaseshelper
root 1795 0.0 0.0 52352 396 ?SSep18 0:00
/usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf
--leasefile-ro --dhcp-script=/usr/lib/libvirt/libvirt_leaseshelper
mdroth7792 0.0 0.0 14244 1028 pts/6S+ 06:43 0:00 grep
--color=auto dnsmasq
mdroth@sif:~$ cat /run/dnsmasq/resolv.conf
nameserver 127.0.0.53
mdroth@sif:~$ systemd-resolve --status
Global
DNS Servers: 127.0.0.1
DNSSEC NTA: 10.in-addr.arpa
16.172.in-addr.arpa
168.192.in-addr.arpa
17.172.in-addr.arpa
18.172.in-addr.arpa
19.172.in-addr.arpa
20.172.in-addr.arpa
21.172.in-addr.arpa
22.172.in-addr.arpa
23.172.in-addr.arpa
24.172.in-addr.arpa
25.172.in-addr.arpa
26.172.in-addr.arpa
27.172.in-addr.arpa
28.172.in-addr.arpa
29.172.in-addr.arpa
30.172.in-addr.arpa
31.172.in-addr.arpa
corp
d.f.ip6.arpa
home
internal
intranet
lan
local
private
test
Link 5 (virbr0-nic)
Current Scopes: none
LLMNR setting: yes
MulticastDNS setting: no
DNSSEC setting: no
DNSSEC supported: no
Link 4 (virbr0)
Current Scopes: none
LLMNR setting: yes
MulticastDNS setting: no
DNSSEC setting: no
DNSSEC supported: no
Link 3 (wlp4s0)
Current Scopes: DNS LLMNR/IPv4 LLMNR/IPv6
LLMNR setting: yes
MulticastDNS setting: no
DNSSEC setting: no
DNSSEC supported: no
DNS Servers: 192.168.2.254
fd6d:6e53:4042::1
DNS Domain: lan
Link 2 (enp0s31f6)
Current Scopes: none
LLMNR setting: yes
MulticastDNS setting: no
DNSSEC setting: no
DNSSEC supported: no
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controlle
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
"if dnsmasq's option "--dns-loop-detect" via DNSMASQ_OPTS in
/etc/default/dnsmasq."
this does not help.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chas
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Hmm I knew I remembered something related ...
In bug 1694156 we have had a - what appears to me as - similar case.
There we could track it down to a config issue, but maybe you here are affected
by the same issue yet without a simple config issue to fix.
The clue there was, that that dnsmasq was configured as global dns server to
resolved in a manually added /etc/resolvconf/resolv.conf.d/tail. Due to that
searches to the local search domain that failed started to be passed back and
forth between dnsmasq and systemd-resolvd.
Does anybody affected here have the same setup of dnsmasq being registered as
global dns? You can check with:
$ systemd-resolve --status
The local dnsmasq should not more be listed in there.
Not sure - but if all affected users would have such a "local dnsmasq is
configured as global dns in systemd-resolved" then we will have to find
which package/config/guide/upgrade-path sets it up that way and resolve
that - but first of all please verify that this would help you.
Also as another option if you explicitly want your local dnsmasq to be
configured in resolved as global dns server - then you might want to
check if dnsmasq's option "--dns-loop-detect" via DNSMASQ_OPTS in
/etc/default/dnsmasq.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
** Tags added: resolved
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvrM77Ver.01.
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Have the same issue with 17.04. Especially then qBittorent starting.
Also huge lag with apt update resolve servers.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: dnsmasq (Ubuntu)
Status: New => Confirmed
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
d
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
It seems that the problem is that dnsmasq is forwarding DNS queries to
the systemd-resolved stub server, but they are incompatible in some
way:. From /var/log/syslog:
Jun 12 17:05:34 sparkly dnsmasq[1177]: using nameserver 127.0.0.53#53
Jun 12 17:05:49 sparkly dnsmasq[1177]: Maximum number of concurrent DNS queries
reached (max: 150)
As a workaround, I edited /etc/dnsmasq.conf and added these lines to
tell it to ignore resolve.conf and hardcoded my ISP's DNS servers
instead:
no-resolv
server=75.75.75.75
server=75.75.76.76
It seems to work: I'm running a hotspot on a USB wifi device and it's
working fine, and there's no sign of the CPU trouble.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
New
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PAT
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
I just tried the workaround Kai-Heng mentioned in #9 above: I added
'DNSSEC=off' to /etc/systemd/resolved.conf, then rebooted.
Unfortunately I'm still seeing this CPU problem.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to dnsmasq in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
New
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dm
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
I've also run into this CPU problem on 17.04. Like tlk, I had to
install dnsmasq because I'm running a hotspot on a USB wifi device, and
the system log indicated that it wouldn't work unless dnsmasq is
installed.
** Also affects: dnsmasq (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in dnsmasq package in Ubuntu:
New
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version:
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
On another not, it seems that dnsmasq was dropped intentionally in
regards to NM (https://launchpad.net/ubuntu/zesty/+source/network-
manager/+changelog), in favor of systemd-resolved. But when I tried to
NAT my desktop's connection to a laptop initially it didn't work out, so
I looked into journalctl and found out that NM explicitly wants
'dnsmasq' executable... Another bug probably?
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
d
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
On a fresh 17.04 install systemd-resolved didn't give me any grief until I've
manually installed dnsmasq, because I wanted NetworkManager to share my
connection from desktop to a laptop and without dnsmasq it fails to do so.
Now I'm hitting this CPU hog problem.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packa
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
I see it all the time after an upgrade to 17.04. Medium priority seems
an euphemism. This is a true showstopper. It is not just systemd-
resolved taking a whole core. Dnsmasq takes half of another. The cpu
runs hot. In a laptop, batteries drain in a snap.
Has this to do with https://unix.stackexchange.com/questions/304050/how-
to-avoid-conflicts-between-dnsmasq-and-systemd-resolved? Should
DNSStubListener=no be added to /etc/systemd/resolved.conf? Should
dnsmasq not be there?
Note that this bug is now 2 months old, that is over 20% of the expected
life of zesty.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=U
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Actually it's happening continuously, it does not even require a wakup,
of wifi reconnection or anything...
It's a complete useless peace of crap.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.v
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Recently I can definitely reproduce the issue anytime.
It's extremely annoying.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvrM7
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
> This is a good workaround, but perhaps the actual fix should be to
remove the package on upgrade to 17.04?
What do you mean by this?
The fix should not ever something like this.
There is reason why dnsmasq is installed on these machines.
This is a workaround by not good.
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You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: He
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Weird, I can reproduce the issue again after about 1-2 weeks of silence...
I can test the DNSSEC=off setting.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
@clvx: I think the other bug is unrelated, although maybe that's what
you're running into instead of this one.
I was also able to fix this problem by removing dnsmasq:
* sudo apt remove dnsmasq
As soon as I did that, both processes dropped to nothing, and DNS still
resolves.
This is a good workaround, but perhaps the actual fix should be to
remove the package on upgrade to 17.04?
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dm
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
I cannot reproduce the issue very recently, for about ~1 week.
Let me check it in another location tomorrow.
ii dnsmasq
2.76-5all
Small caching DNS proxy and DHCP/TFTP server
ii systemd 232-21ubuntu2
amd64system and service manager
ii systemd-sysv 232-21ubuntu2
amd64system and service manager - SysV links
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernel
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Kai-Heng, At least for me, it's working now. Btw, before changing
DNSSEC=off, I tested removing dnsmasq to keep only systemd-resolved(as
someone mentioned above), and systemd-resolved didn't resolve any
domain. I had to install dnsmasq again to have some sort of connection.
Is this bug related to this one[1]?
[1] https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1624320
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Does put 'DNSSEC=off' to /etc/systemd/resolved.conf help?
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvrM77Ver.01.05:bd03/09/2015
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
** Description changed:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like starting
the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
-
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
-
-
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
- LANGUAGE=en_US:en
- TERM=xterm
- PATH=(custom, no user)
- LANG=en_US.UTF-8
- SHELL=/bin/zsh
+ LANGUAGE=en_US:en
+ TERM=xterm
+ PATH=(custom, no user)
+ LANG=en_US.UTF-8
+ SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvrM77Ver.01.05:bd03/09/2015:svnHewlett-Packard:pnHPEliteBookFolio1020G1:pvrA3009DD18303:rvnHewlett-Packard:rn2271:rvrKBCVersion91.4C:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook Folio 1020 G1
dmi.product.versi
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
1. top
PID USER PR NIVIRTRESSHR S %CPU %MEM TIME+ COMMAND
19147 systemd+ 20 0 50848 6232 4572 R 99.0 0.1 5:43.81
systemd-resolve
1472 dnsmasq 20 0 57020 3084 2620 R 63.1 0.0 44:03.49 dnsmasq
2. journalctl -u systemd-resolved.service
Apr 16 13:01:59 Danny systemd-resolved[19147]: DNSSEC validation failed for
question clients-china.l.google.com IN A: failed-auxiliary
Apr 16 13:02:02 Danny systemd-resolved[19147]: Using degraded feature set
(UDP+EDNS0) for DNS server 127.0.0.1.
Apr 16 13:02:08 Danny systemd-resolved[19147]: Server 127.0.0.1 does not
support DNSSEC, downgrading to non-DNSSEC mode.
Apr 16 13:06:24 Danny systemd-resolved[19147]: Server 192.168.128.1 does not
support DNSSEC, downgrading to non-DNSSEC mode.
Apr 16 13:11:24 Danny systemd-resolved[19147]: Grace period over, resuming full
feature set (UDP+EDNS0+DO+LARGE) for DNS server 127.0.0.1.
3. journalctl -u dnsmasq.service
Apr 16 13:18:27 Danny dnsmasq[1472]: Maximum number of concurrent DNS queries
reached (max: 150)
Apr 16 13:18:33 Danny dnsmasq[1472]: Maximum number of concurrent DNS queries
reached (max: 150)
Apr 16 13:18:39 Danny dnsmasq[1472]: Maximum number of concurrent DNS queries
reached (max: 150)
Apr 16 13:18:45 Danny dnsmasq[1472]: Maximum number of concurrent DNS queries
reached (max: 150)
Apr 16 13:18:51 Danny dnsmasq[1472]: Maximum number of concurrent DNS queries
reached (max: 150)
4. lsb_release -a
Distributor ID: Ubuntu
Description:Ubuntu 17.04
Release:17.04
Codename: zesty
5. sudo strace -p 1472 --- dnsmasq
bind(12, {sa_family=AF_INET, sin_port=htons(37051),
sin_addr=inet_addr("0.0.0.0")}, 16) = 0
sendto(12, "g\325\1\20\0\1\0\0\0\0\0\1\rclients-china\1l\6goo"..., 55, 0,
{sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.53")}, 16)
= 55
poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN},
{fd=6, events=POLLIN}, {fd=7, events=POLLIN}, {fd=8, events=POLLIN}, {fd=9,
events=POLLIN}, {fd=12, events=POLLIN}], 8, -1) = 2 ([{fd=4, revents=POLLIN},
{fd=12, revents=POLLIN}])
recvfrom(12, "g\325\201\200\0\1\0\6\0\0\0\1\rclients-china\1l\6goo"..., 5131,
0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.53")},
[16]) = 151
sendmsg(4, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33355),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"\272\303\201\220\0\1\0\6\0\0\0\1\rclients-china\1l\6goo"...,
151}], msg_controllen=0, msg_flags=0}, 0) = 151
close(12) = 0
recvmsg(4, {msg_name(16)={sa_family=AF_INET, sin_port=htons(57326),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"C\21\1\20\0\1\0\0\0\0\0\1\rclients-china\1l\6goo"..., 4096}],
msg_controllen=0, msg_flags=0}, 0) = 55
socket(AF_INET, SOCK_DGRAM, IPPROTO_IP) = 12
fcntl(12, F_GETFL) = 0x2 (flags O_RDWR)
fcntl(12, F_SETFL, O_RDWR|O_NONBLOCK) = 0
6. sudo strace -p 1914
clock_gettime(CLOCK_BOOTTIME, {5858, 172230641}) = 0
open("/run/systemd/netif/links/2", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=1040890848,
u64=94559040879584}}) = 0
write(18, ";q\1\20\0\1\0\0\0\0\0\1\17ec2-52-7-217-10\tcom"..., 68) = 68
clock_gettime(CLOCK_BOOTTIME, {5858, 172456596}) = 0
clock_gettime(CLOCK_BOOTTIME, {5858, 172482649}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
sendmsg(15, {msg_name(16)={sa_family=AF_INET, sin_port=htons(45041),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"qX\201\200\0\1\0\1\0\0\0\1\17ec2-52-7-217-10\tcom"..., 84}],
msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP, cmsg_type=IP_PKTINFO,
{ipi_ifindex=if_nametoindex("lo"), ipi_spec_dst=inet_addr("127.0.0.53"),
ipi_addr=inet_addr("127.0.0.53")}}], msg_flags=0}, 0) = 84
epoll_wait(4, [{EPOLLIN, {u32=1039855040, u64=94559039843776}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {5858, 172675790}) = 0
recvfrom(15, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 68
recvmsg(15, {msg_name(16)={sa_family=AF_INET, sin_port=htons(48677),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"\313{\1\20\0\1\0\0\0\0\0\1\17ec2-52-7-217-10\tcom"..., 3936}],
msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP, cmsg_type=IP_PKTINFO,
{ipi_ifindex=if_nametoindex("lo"), ipi_spec_dst=inet_addr("127.0.0.53"),
ipi_addr=inet_addr("127.0.0.53")}}, {cmsg_len=20, cmsg_level=SOL_IP,
cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0) = 68
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\213\235", 2, GRND_NONBLOCK) = 2
stat("/etc/resolv.conf",
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
This bug still exists in ubuntu 17.04 release version!
100% CPU with "Unassigned", OMG!
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
lxc and lxd do not depend on dnsmasq in Ubuntu 17.04.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvrM77Ver.01.05:bd03/09/201
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Remove dnsmasq is not an option when you are using lxd/lxc.
You may reassign this bug to dnsmasq.
A temporary solution can be to append your nameserver in
/etc/resolvconf/resolv.conf.d/head
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CN
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Also had 100% CPU after upgrade, together with failing DNS resolution and
dnsmasq complaining about having reached the max number of simultaneous
requests.
Removing dnsmasq has fixed it for me.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.ta
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
It also happens when you are connected by wire. XPS13 9350 affected
after upgrading from 16.10(yaketti) to 17.04(zetsy(.
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
** Changed in: systemd (Ubuntu)
Importance: Undecided => Medium
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvrM77Ver.01.0
[Touch-packages] [Bug 1670959] Re: systemd-resolved using 100% CPU
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: systemd (Ubuntu)
Status: New => Confirmed
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1670959
Title:
systemd-resolved using 100% CPU
Status in systemd package in Ubuntu:
Confirmed
Bug description:
Sometimes systemd-resolved process is using 100% CPU.
After a while it changes back to normal.
It happens usually after connecting to the (wifi) network, like
starting the OS.
strace output:
sendmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"6\215\201\200\0\1\0\1\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\300\f\0\34\0\1\0\0\10\235\0\20&\6(\0\0024\0Y%L\4\6#f&\214\0\0)\377\326\0\0\0\0\0\0",
81}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}}],
msg_flags=0}, 0) = 81
sendmsg(3, {msg_name(0)=NULL,
msg_iov(4)=[{"PRIORITY=6\nSYSLOG_FACILITY=3\nCODE_FILE=../src/resolve/resolved-dns-stub.c\nCODE_LINE=363\nCODE_FUNCTION=dns_stub_process_query\nSYSLOG_IDENTIFIER=systemd-resolved\n",
160}, {"MESSAGE=", 8}, {"Processing query...", 19}, {"\n", 1}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 188
epoll_wait(4, [{EPOLLIN, {u32=3176459184, u64=94565471415216}}], 16, -1) = 1
clock_gettime(CLOCK_BOOTTIME, {44665, 938069872}) = 0
recvfrom(12, NULL, 0, MSG_PEEK|MSG_TRUNC, NULL, NULL) = 53
recvmsg(12, {msg_name(16)={sa_family=AF_INET, sin_port=htons(33589),
sin_addr=inet_addr("127.0.0.1")},
msg_iov(1)=[{"Z\262\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
3936}], msg_controllen=56, [{cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=IP_PKTINFO, {ipi_ifindex=if_nametoindex("lo"),
ipi_spec_dst=inet_addr("127.0.0.53"), ipi_addr=inet_addr("127.0.0.53")}},
{cmsg_len=20, cmsg_level=SOL_IP, cmsg_type=IP_TTL, {ttl=64}}], msg_flags=0}, 0)
= 53
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\365I", 2, GRND_NONBLOCK)= 2
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
getrandom("\203;", 2, GRND_NONBLOCK)= 2
clock_gettime(CLOCK_BOOTTIME, {44665, 938446937}) = 0
open("/run/systemd/netif/links/3", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=303, ...}) = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 18
connect(18, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
epoll_ctl(4, EPOLL_CTL_ADD, 18, {EPOLLIN, {u32=3176610576,
u64=94565471566608}}) = 0
write(18,
"\203;\1\20\0\1\0\0\0\0\0\1\4cs41\3wac\vedgecastcdn\3net\0\0\34\0\1\0\0)\2\0\0\0\0\0\0\0",
53) = 53
clock_gettime(CLOCK_BOOTTIME, {44665, 938833717}) = 0
clock_gettime(CLOCK_BOOTTIME, {44665, 938875138}) = 0
epoll_ctl(4, EPOLL_CTL_DEL, 18, NULL) = 0
close(18) = 0
journalctl output:
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:35 parsec systemd-resolved[1512]: Processing query...
Mar 08 08:25:41 parsec dnsmasq[1545]: Maximum number of concurrent DNS
queries reached (max: 150)
As you can see, I would use it together with dnsmasq.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: systemd 232-18ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Wed Mar 8 08:20:18 2017
MachineType: Hewlett-Packard HP EliteBook Folio 1020 G1
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-9-generic
root=UUID=a54fe703-35d4-47ac-9c6e-4034421531fb ro rootflags=subvol=@
SourcePackage: systemd
UpgradeStatus: Upgraded to zesty on 2015-05-24 (653 days ago)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M77 Ver. 01.05
dmi.board.name: 2271
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.4C
dmi.chassis.asset.tag: CNU51199KV
dmi.chassis.type: 10
dmi.chassis.vendor: He
