> -----Original Message----- > From: Christian Schwede [mailto:cschwede at redhat.com] > Sent: 28 May 2015 20:03 > To: George Shuklin; openstack-operators at lists.openstack.org > Subject: Re: [Openstack-operators] 100% CPU and hangs if syslog is restarted > > 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: > Using UDP is a great workaround but it does not feel like a fix... can't the daemons realise that the syslog socket is not alive and reconnect. Given it affects most of the OpenStack projects, a fix inside one of the oslo logging libraries (if the error can be detected there) would be great. > https://bugs.launchpad.net/swift/+bug/780025 > https://review.openstack.org/#/c/8841/ > > Summarized: using UDP instead of a unix socket fixes this. > > -- Christian > > > > > Tim > > _______________________________________________ > OpenStack-operators mailing list > OpenStack-operators at lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators