Thanks, Ben We found out that our problem is most probably with L2 guests and issue with kvm: https://www.spinics.net/lists/kvm/msg142390.html - so hanging OVS threads is just a consequence.
Sorry for disturbing. Thanks, Oleg On Thu, Jan 12, 2017 at 9:44 PM, Ben Pfaff <[email protected]> wrote: > On Thu, Jan 12, 2017 at 05:01:58PM +0400, Oleg Bondarev wrote: > > Hi, > > > > During OpenStack testing with OVS 2.6.1 we sometime face an issue that > OVS > > may get stuck on a node, looks like: > > - http://paste.openstack.org/show/594688/ > > - http://paste.openstack.org/show/594509/ > > - http://paste.openstack.org/show/594670/ > > > > Is it some known issue? Was commit [1] supposed to fix it? > > > > [1] > > https://github.com/openvswitch/ovs/commit/13b6d087906e5284df5e03caa299c1 > 1e884a14d4 > > It's not a known issue. I don't think that [1] would fix it because > that only affects new threads, whereas this issue is at least sometimes > about the main thread (the first thread created as part of the process) > getting stuck. > > The most valuable information for debugging here would be a backtrace of > the stuck thread. It's blocking for some reason and we don't know why. >
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