Comment 67 for bug 1596075

Hey,

Sorry about the delay. Looking into the logs from the last several messages.

To answer your question about heat vs the scripts, heat can be experiencing more failures because heat itself makes use of mysql itself to store task states and when you have multiple workers talking to different writers in a galera cluster, things that should have blocked on a record lock instead manifest as a Deadlock error on commit.

Basically it can be experiencing failures for the same reason Neutron is. Openstack doesn't get any in-tree testing of multi-writer environments so there are places where failures can slip through or retries get a lot more expensive than developers initially anticipated.