as per grafana  the functional job is broken. Looking at logstash 
it started happening consistently since 2017-08-03 16:27. I didn't find
any particular patch in Neutron that could cause it.
The culprit is that ovsdb starts misbehaving  and then we retry calls
indefinitely. We still use 2.5.2 openvswitch as we had before. I opened
a bug  and started investigation, I'll update my findings there.
I think at this point there is no reason to run "recheck" on your patches.
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