Libvirt crashes after startup "/var/run/libvirt/uml-guest: No space left on device" after upgrade from 14.04 to 14.10

[Tim H]

I have just upgraded 2 of my machines from 14.04 to 14.10. Both have the same error after the upgrade.

When the libvirt-bin service is started it crashes with the error:

2014-10-29 00:57:51.863+0000: 4809: info : libvirt version: 1.2.8, package: 1.2.8-0ubuntu11
2014-10-29 00:57:51.863+0000: 4809: error : umlStateInitialize:561 : Failed to create inotify watch on /var/run/libvirt/uml-guest: No space left on device
2014-10-29 00:57:51.863+0000: 4809: error : virStateInitialize:749 : Initialization of UML state driver failed: Unknown problem

df -i shows plenty of space in the directory

Filesystem Inodes IUsed IFree IUse% Mounted on
tmpfs 1021899 527 1021372 1% /run

[Serge Hallyn (serge-hallyn)]

Interesting. Could you please show the results of:

cat /proc/self/mounts /proc/self/mountinfo
df -h

[Tim H (d5o)]

Sorry, both my computers update overnight and now the bug is no longer occurring do you still want the output of those commands.

[Serge Hallyn (serge-hallyn)]

Thanks, no, that probably won't be helpful then.

I'm going to mark this bug invalid, meaning "cannot be reproduced". Please
mark it confirmed if you see it happen again, and add any new info that
you can.

 status: invalid

[Hajime Inoue (hajime-inoue)]

This message will also occur if you have exhausted your inotify watches -- the error message is deceptive.