Hello Andrew,
I just reviewed the core file that you provided. Thread 1 is the thread that
panics
on assertion because sock.pending_send is already set. This is the condition I
prevented
in the PPA, so *shouldn't* be hitting the frame 3
In my test systems I don't hit this condition, dispatch_send isn't called if
pending_send
is set.
(gdb) thread 1
[Switching to thread 1 (Thread 0x7f39a41f5700 (LWP 18780))]
#1 0x00007f39a4dd1859 in __GI_abort () at abort.c:79
79 in abort.c
(gdb) bt
#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x00007f39a4dd1859 in __GI_abort () at abort.c:79
#2 0x00007f39a4faf985 in isc_assertion_failed (file=<optimized out>,
line=<optimized out>, type=<optimized out>, cond=<optimized out>) at
../../../lib/isc/assertions.c:52
#3 0x00007f39a4feb7e1 in dispatch_send (sock=0x7f39a4a03730) at
../../../../lib/isc/unix/socket.c:3380
#4 process_fd (writeable=<optimized out>, readable=<optimized out>, fd=0,
manager=0x7f39a49fa010) at ../../../../lib/isc/unix/socket.c:4054
#5 process_fds (writefds=<optimized out>, readfds=0x16, maxfd=-1533038191,
manager=0x7f39a49fa010) at ../../../../lib/isc/unix/socket.c:4211
#6 watcher (uap=0x7f39a49fa010) at ../../../../lib/isc/unix/socket.c:4397
[...]
(gdb) frame 3
#3 0x00007f39a4feb7e1 in dispatch_send (sock=0x7f39a4a03730) at
../../../../lib/isc/unix/socket.c:3380
3380 ../../../../lib/isc/unix/socket.c: No such file or directory.
(gdb) info locals
iev = 0x0
ev = <optimized out>
sender = 0x2
iev = <optimized out>
ev = <optimized out>
sender = <optimized out>
(gdb) p sock
$1 = (isc__socket_t *) 0x7f39a4a03730
(gdb) p sock.pending_send
$2 = 1
Can you check your library links, etc?
ubuntu@dhcpd1:~$ ldd /usr/sbin/dhcpd | grep export
libirs-export.so.161 => /lib/x86_64-linux-gnu/libirs-export.so.161
(0x00007f5cb62e5000)
libdns-export.so.1109 => /lib/x86_64-linux-gnu/libdns-export.so.1109
(0x00007f5cb60b0000)
libisc-export.so.1105 => /lib/x86_64-linux-gnu/libisc-export.so.1105
(0x00007f5cb6039000)
libisccfg-export.so.163 =>
/lib/x86_64-linux-gnu/libisccfg-export.so.163 (0x00007f5cb5df5000)
ubuntu@dhcpd1:~$ dpkg -S /lib/x86_64-linux-gnu/libisc-export.so.1105
libisc-export1105:amd64: /lib/x86_64-linux-gnu/libisc-export.so.1105
ubuntu@dhcpd1:~$ apt-cache policy libisc-export1105 | grep -i ppa
Installed: 1:9.11.16+dfsg-3~ppa1
Candidate: 1:9.11.16+dfsg-3~ppa1
*** 1:9.11.16+dfsg-3~ppa1 500
500 http://ppa.launchpad.net/niedbalski/1872188-dbg/ubuntu focal/main
amd64 Packages
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https://bugs.launchpad.net/bugs/1872118
Title:
DHCP Cluster crashes after a few hours
Status in DHCP:
New
Status in bind9-libs package in Ubuntu:
New
Status in isc-dhcp package in Ubuntu:
Confirmed
Status in bind9-libs source package in Focal:
New
Status in isc-dhcp source package in Focal:
New
Status in bind9-libs source package in Groovy:
New
Status in isc-dhcp source package in Groovy:
Confirmed
Bug description:
I have a pair of DHCP serevrs running in a cluster on ubuntu 20.04, All
worked perfectly until recently, when they started stopping with code=killed,
status=6/ABRT.
This is being fixed by
https://bugs.launchpad.net/bugs/1870729
However now one stops after a few hours with the following errors. One
can stay on line but not both.
Syslog shows
Apr 10 17:20:15 dhcp-primary sh[6828]:
../../../../lib/isc/unix/socket.c:3361: INSIST(!sock->pending_send) failed,
back trace
Apr 10 17:20:15 dhcp-primary sh[6828]: #0 0x7fbe78702a4a in ??
Apr 10 17:20:15 dhcp-primary sh[6828]: #1 0x7fbe78702980 in ??
Apr 10 17:20:15 dhcp-primary sh[6828]: #2 0x7fbe7873e7e1 in ??
Apr 10 17:20:15 dhcp-primary sh[6828]: #3 0x7fbe784e5609 in ??
Apr 10 17:20:15 dhcp-primary sh[6828]: #4 0x7fbe78621103 in ??
nothing in kern.log
apport.log shows
ERROR: apport (pid 6850) Fri Apr 10 17:20:15 2020: called for pid 6828,
signal 6, core limit 0, dump mode 2
ERROR: apport (pid 6850) Fri Apr 10 17:20:15 2020: not creating core for pid
with dump mode of 2
ERROR: apport (pid 6850) Fri Apr 10 17:20:15 2020: executable:
/usr/sbin/dhcpd (command line "dhcpd -user dhcpd -group dhcpd -f -4 -pf
/run/dhcp-server/dhcpd.pid -cf /etc/dhcp/dhcpd.conf")
ERROR: apport (pid 6850) Fri Apr 10 17:20:15 2020: is_closing_session(): no
DBUS_SESSION_BUS_ADDRESS in environment
ERROR: apport (pid 6850) Fri Apr 10 17:20:15 2020: wrote report
/var/crash/_usr_sbin_dhcpd.0.crash
/var/crash/_usr_sbin_dhcpd.0.crash shows
ProblemType: Crash
Architecture: amd64
CrashCounter: 1
Date: Fri Apr 10 17:20:15 2020
DistroRelease: Ubuntu 20.04
ExecutablePath: /usr/sbin/dhcpd
ExecutableTimestamp: 1586210315
ProcCmdline: dhcpd -user dhcpd -group dhcpd -f -4 -pf
/run/dhcp-server/dhcpd.pid -cf /etc/dhcp/dhcpd.conf
ProcEnviron: Error: [Errno 13] Permission denied: 'environ'
ProcMaps: Error: [Errno 13] Permission denied: 'maps'
ProcStatus:
Name: dhcpd
Umask: 0022
State: D (disk sleep)
Tgid: 6828
Ngid: 0
Pid: 6828
PPid: 1
TracerPid: 0
Uid: 113 113 113 113
Gid: 118 118 118 118
FDSize: 128
Groups:
NStgid: 6828
NSpid: 6828
NSpgid: 6828
NSsid: 6828
VmPeak: 236244 kB
VmSize: 170764 kB
VmLck: 0 kB
VmPin: 0 kB
VmHWM: 12064 kB
VmRSS: 12064 kB
RssAnon: 5940 kB
RssFile: 6124 kB
RssShmem: 0 kB
VmData: 30792 kB
VmStk: 132 kB
VmExe: 592 kB
VmLib: 5424 kB
VmPTE: 76 kB
VmSwap: 0 kB
HugetlbPages: 0 kB
CoreDumping: 1
THP_enabled: 1
Threads: 4
SigQ: 0/7609
SigPnd: 0000000000000000
ShdPnd: 0000000000000000
SigBlk: 0000000000000000
SigIgn: 0000000000001000
SigCgt: 0000000180000000
CapInh: 0000000000000000
CapPrm: 0000000000000000
CapEff: 0000000000000000
CapBnd: 0000003fffffffff
CapAmb: 0000000000000000
NoNewPrivs: 0
Seccomp: 0
Speculation_Store_Bypass: thread vulnerable
Cpus_allowed: 3
Cpus_allowed_list: 0-1
Mems_allowed:
00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,0000
0000,00000000,00000000,00000001
Mems_allowed_list: 0
voluntary_ctxt_switches: 111
nonvoluntary_ctxt_switches: 144
Signal: 6
Uname: Linux 5.4.0-21-generic x86_64
UserGroups:
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