Non responsive state for systemd

[Lennart Poettering]

On Wed, 06.03.13 06:55, Steve Clark (sclark at netwolves.com) wrote:

> On 03/04/2013 07:05 PM, Lennart Poettering wrote:
> >On Mon, 04.03.13 10:24, David Highley (dhighley at highley-recommended.com) wrote:
> >
> >>"Lennart Poettering wrote:"
> >>>On Mon, 04.03.13 07:56, David Highley (dhighley at highley-recommended.com) wrote:
> >>>
> >>>>Twice now we have one Fedora 18 system where systemd seems to get into a
> >>>>non responsive state. We are not able to get the status of any service
> >>>>and we're not able to do an init 6 to restart the system.
> >>>>
> >>>>Did notice today that a full process list showed a message about abrt
> >>>>and something to the effect "nobody cared". We also see a number of
> >>>>defunct processes that seem to never clear. So far the only remedy we
> >>>>have found is a hard power cycle.
> >>>Can you get a stack trace of PID1? "sudo pstack 1" should already give a
> >>>hint, but even better would be a a "bt full" via gdb.
> >>We are offsite right now so will dig deeper later. We had checked the
> >>log files and noticed that it complains about rsyncd not being able to
> >>connect to a port and there was another complaint about Gnome. The
> >>rsync one repeats as there are back ups that are not being serviced
> >>which is is what alerted to something being wrong. We are sending and
> >>receiving email from this system. It also has an internal web, mysql,
> >>and other subsystems which seem to work fine. So when this state occurs
> >>it sometimes takes a while to notice.
> >This is a bug in libselinux:
> >
> >https://bugzilla.redhat.com/show_bug.cgi?id=901812
>
> This is exact reason you don't make the most important user space program dependent on a lot of other stuff!

True thing. libselinux is a library we really really should avoid
linking against. I mean, it's almost as bad as libc, we really should
avoid linking against that from PID 1 too. Oh man, those systemd guys
are such idiots that they dare to link against libc and
libselinux!

Lennart

-- 
Lennart Poettering - Red Hat, Inc.