On 10/02/2014 08:10 AM, Oleg Bondarev wrote: > Hi, > > It turns out that there is a 1:1 relationship between > rpc_thread_pool_size messaging config [1] and the number of instances > that can be spawned simultaneously. > Please see bug [2] for more details. > I think this should be at least documented. Thoughts? > > Thanks, > Oleg > > [1] > https://github.com/openstack/oslo.messaging/blob/master/oslo/messaging/_executors/impl_eventlet.py > [2] https://bugs.launchpad.net/neutron/+bug/1372049 Seems like the fix would be to allow the oslo.messaging thread pool to grow as needed. If we don't fix it, then yes this should probably be documented somewhere. I'm guessing there are other places in nova where we might get bit by the same scenario if the timing is just right. Chris