[Lxc-users] can't restart container without rebooting entire host, because can't delete cgroups files, tasks is 0

[Miroslav Lednicky]

Hello,

	it is the same problem as I have may be:

http://sourceforge.net/mailarchive/forum.php?thread_name=4CD297E2.2030806%40avonet.cz&forum_name=lxc-users

I don't know what can I do with it.

Server reboot is necessary ...

I have Ubuntu 10.04 x64 server.

Best regards,

Miroslav.

Dne 5.11.2010 18:14, Brian K. White napsal(a):
> I have lxc 0.7.2 on openSUSE 11.2, which is kernel 2.6.31
>
> I get this all the time on my other boxes which up to now have been lxc
> 0.6.5 on the same kernel, but I've lived with it by just trying to never
> reboot containers, and only using containers for services that can stand
> to be rebooted so that I can actually reboot the host and thus all
> containers if I have to.
>
> Now I have a few containers on another box with lxc 0.7.2 and the user
> of one of the containers tried to reboot his vps and it can't restart
> because there are cgroups files that can't be deleted. tasks file is
> empty in that cgroups directory,
> nj9:~ # cat /cgroup/nj10-014/tasks |od
> 0000000
> nj9:~ #
> but there are several pid subdirectories with files in each. They can't
> be deleted.
> lxc-ps -elf shows no processes in that container.
>
> lxc-ls shows no containers at all, although definitely one other
> container is running and working and has processes in lxc-ps.
>
> And I can't really reboot the host this time without telling a lot of
> paying customers to get out and stop working for a while.
>
> I could probably get this container back up temporarily by just renaming
> it so it doesn't collide with the stale cgroups files, but the question
> is, I thought this was fixed? was it a kernel bug and I need a newer
> kernel to clear this up ?
>