Attached is a full strace from dnsmasq startup showing the problem.
** Attachment added: "dnsmasq-strace.log"
https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1314697/+attachment/4107998/+files/dnsmasq-strace.log
** Summary changed:
- Upon upgrade, DNS resolution no longer works; dnsma
** Summary changed:
- Upon upgrade, DNS resolution no longer works
+ Upon upgrade, DNS resolution no longer works; dnsmasq uses 100% CPU
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Title:
Observations:
This is not dependent on multiple instances of dnsmasq running - I've
disabled the libvirt and lxc-net instances, and the network-manager
dnsmasq still spins at 100% CPU and fails to resolve DNS queries.
Attached is the strace output from boot of the dnsmasq instance spawned
by netw
And, for good measure, the lsof output.
** Attachment added: "lsof | grep dnsmasq output"
https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1314697/+attachment/4107634/+files/lsof
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On 02/05/14 12:00, Adam Smith wrote:
> LSOF output below. I tried to put a strace in init.d but failed
> miserably
>
> lsof | grep dnsmasq
>
> dnsmasq 1430 dnsmasq cwd unknown
>/proc/1430/cwd (readlink: Permission denied)
> dnsmasq 1430
LSOF output below. I tried to put a strace in init.d but failed
miserably
lsof | grep dnsmasq
dnsmasq 1430 dnsmasq cwd unknown
/proc/1430/cwd (readlink: Permission denied)
dnsmasq 1430 dnsmasq rtd unknown
On 01/05/14 07:45, Colin King wrote:
> I'm seeing this too, strace show it spinning on:
>
> select(8, [0 3 6 7], [], [6], NULL) = 1 (in [0])
> recvmsg(0, 0x7fffdb2aa6d0, 0) = -1 ENOTSOCK (Socket operation on non-socket)
> accept(0, 0, NULL) = -1 ENOTSOCK (Socket operation on non-socket)
> select(8
I'm seeing this too, strace show it spinning on:
select(8, [0 3 6 7], [], [6], NULL) = 1 (in [0])
recvmsg(0, 0x7fffdb2aa6d0, 0) = -1 ENOTSOCK (Socket operation on non-socket)
accept(0, 0, NULL) = -1 ENOTSOCK (Socket operation on non-socket)
select(8, [0 3 6 7], [], [6], NULL) = 1 (in [0])
recvmsg(
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: dnsmasq (Ubuntu)
Status: New => Confirmed
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Title:
Up
Thanks for the workaround Thomas.
I've checked a few more things, firstly I found this in syslog at
startup, missing from my earlier attachment:
Apr 30 18:57:06 donkey NetworkManager[1162]: DNS: starting dnsmasq...
Apr 30 18:57:06 donkey NetworkManager[1162]: dnsmasq not available on
the bus,
Assuming you are using NetworkManager, a better way to work around the
problem than editing resolv.conf by hand is to edit
/etc/NetworkManager/NetworkManager.conf and comment out the line
`dns=dnsmasq`, save, and then `restart network-manager`. This will cause
NetworkManager not to use a slave inst
Also note that dnsmasq is running under user=nobody and running at
99-100% CPU.
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Title:
Upon upgrade, DNS resolution no longer works
To manage n
** Attachment added: "dnsmasqlog"
https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1314697/+attachment/4101512/+files/dnsmasqlog
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