The stack trace seems to indicate that FD_SETSIZE was exceeded.
Specifically, FD_SET was called with an fd >= 1024 at
http://bazaar.launchpad.net/~scott/libnih/trunk/view/head:/nih/io.c#L176.
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Yes I was able to hit 1024 open fd's.
On Mon, Jan 11, 2016 at 9:18 AM, Serge Hallyn <1532...@bugs.launchpad.net>
wrote:
> Can you show 'ls /proc/$(pidof cgmanager)/fd' at a few times?
>
> This is something we've run into with normal operation in go, but since
> cgmanager is not threaded it
They were all sockets.
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https://bugs.launchpad.net/bugs/1532314
Title:
Buffer overflow in cgmanager
Status in lxc package in Ubuntu:
Incomplete
Bug
Public bug reported:
Host: Ubuntu 15.10
lxc: 1.1.5-0ubuntu0.15.10.3
cgmanager: 0.39-2ubuntu2
Container: Ubuntu 15.10
Got the following trace in syslog. Please let me know what other
information will be useful for troubleshooting.
Jan 8 19:29:24 ip-10-169-249-164 cgmanager[7725]: *** buffer
** Attachment added: "/var/crash/_sbin_cgmanager.0.crash"
https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1532314/+attachment/4546429/+files/crash
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It can happen fairly often. For example, in one case it happened 5 times
within a span of less than 30 minutes.
Jan 8 05:35:04 ip-10-169-176-230 cgmanager[781]: *** buffer overflow detected
***: /sbin/cgmanager terminated
Jan 8 05:40:23 ip-10-169-176-230 cgmanager[15954]: *** buffer overflow
Thanks for looking into it. Are there any downsides to disabling udev in
the container (by removing /etc/init/udev.conf for example) if we don't
need the container to be notified of new devices?
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Public bug reported:
Host:
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=15.10
DISTRIB_CODENAME=wily
DISTRIB_DESCRIPTION="Ubuntu 15.10"
lxc version: 1.1.4-0ubuntu1
In a LXC container running Ubuntu 15.10, install upstart-sysv to replace
systemd. Using FUSE then causes almost all processes in the container
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