Comment 4 for bug 1480698

Yeah, I'm trying to figure out what's going on by periodically dumping information about connections to MySQL (https://review.openstack.org/#/c/209858/ - periodic task in nova-conductor).

I rechecked the patch multiple times - for most jobs the number of connections never exceeds ~150-200 units. So it's not clear to me how we actually managed to hit this problem (as in devstack the max connections number limit is set to 1024 - https://github.com/openstack-dev/devstack/blob/master/lib/databases/mysql#L99).

Curiously, according to logstash, there was another hit in the gate recently. But it was another Neutron job. I'm going to try something similar with Neutron too, as those jobs are only triggered on new changes to Neutron code.