sssd many ccache-files

Hi sssd users,

sssd creates many ccache-files under /var/lib/sss/db/. They become so much, that the maximum number of inodes (default: 32768) for the partition is reached. This results in several other problems (failed logins, processes can't create sockets, etc).
Why are so many files created? Is there a way to limit the maximum number of created files?
Right now I'm running a daily Cronjob that deletes the sssd-cache (sss_cache -E).

I'm running RHEL6.6 and sssd 1.11.6 with AD as backend.
Linux 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux

Thanks
Sebastian

[Lukas Slebodnik]

On (24/03/15 14:26), [e-mail] wrote:
> Hi sssd users,
>
> sssd creates many ccache-files under /var/lib/sss/db/. They become so much, that the maximum number of inodes (default: 32768) for the partition is reached. This results in several other problems (failed logins, processes can't create sockets, etc).
> Why are so many files created? Is there a way to limit the maximum number of created files?
> Right now I'm running a daily Cronjob that deletes the sssd-cache (sss_cache -E).
>
> I'm running RHEL6.6 and sssd 1.11.6 with AD as backend.
> Linux 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux

It looks like a bug https://fedorahosted.org/sssd/ticket/2592

LS

[Jakub Hrozek]

On Wed, Mar 25, 2015 at 09:12:50AM +0100, Lukas Slebodnik wrote:
> On (24/03/15 14:26), [e-mail] wrote:
> > Hi sssd users,
> >
> > sssd creates many ccache-files under /var/lib/sss/db/. They become so much, that the maximum number of inodes (default: 32768) for the partition is reached. This results in several other problems (failed logins, processes can't create sockets, etc).
> > Why are so many files created? Is there a way to limit the maximum number of created files?
> > Right now I'm running a daily Cronjob that deletes the sssd-cache (sss_cache -E).
> >
> > I'm running RHEL6.6 and sssd 1.11.6 with AD as backend.
> > Linux 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux
>
> It looks like a bug https://fedorahosted.org/sssd/ticket/2592

Yes. But that bug only happened if ldap_child was failing, so an easy
workaround might be to fix the client. I also thought I caused the bug
during the 1.12 changes, but I might be wrong about that one. Finally,
I'm suprised sss_cache -E helps, because all the command does is set
cache expiration to the past. It never deletes anything.

[Lukas Slebodnik]

On (25/03/15 09:21), Jakub Hrozek wrote:
> On Wed, Mar 25, 2015 at 09:12:50AM +0100, Lukas Slebodnik wrote:
> > On (24/03/15 14:26), [e-mail] wrote:
> > > Hi sssd users,
> > >
> > > sssd creates many ccache-files under /var/lib/sss/db/. They become so much, that the maximum number of inodes (default: 32768) for the partition is reached. This results in several other problems (failed logins, processes can't create sockets, etc).
> > > Why are so many files created? Is there a way to limit the maximum number of created files?
> > > Right now I'm running a daily Cronjob that deletes the sssd-cache (sss_cache -E).
> > >
> > > I'm running RHEL6.6 and sssd 1.11.6 with AD as backend.
> > > Linux 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux
> >
> > It looks like a bug https://fedorahosted.org/sssd/ticket/2592
>
> Yes. But that bug only happened if ldap_child was failing, so an easy
> workaround might be to fix the client. I also thought I caused the bug
> during the 1.12 changes, but I might be wrong about that one.

I tried to apply patch to the branch 1.11 and there wasn't any conflict.
> I'm suprised sss_cache -E helps, because all the command does is set
> cache expiration to the past. It never deletes anything.

Sebastian,
The patch is not in any upstream release yet.
But you can try to test with prerelease of sssd-1.12.
I have a prepared COPR repo
https://copr.fedoraproject.org/coprs/lslebodn/sssd-1-12-latest/

LS