[Openstack-operators] 100% CPU and hangs if syslog is restarted

Christian Schwede cschwede at redhat.com
Thu May 28 18:03:00 UTC 2015

On 28.05.15 18:56, George Shuklin wrote:
> Today we've discover a very serious bug in juno: 
> https://bugs.launchpad.net/nova/+bug/1459726
> In short: if you're using syslog, and restart rsyslog, all APIs 
> processes will eventually stuck with 100% CPU usage without doing
> anything.
> Is anyone hits this bug before? It looks like very nasty.

Yes, the Swift project hit this bug in the past too, though it was fixed
awhile ago:


Summarized: using UDP instead of a unix socket fixes this.

-- Christian

More information about the OpenStack-operators mailing list