Comment 20 for bug 1503312

What version of keystone is this? We have some caching in some versions but there were issues.

Also are you doing master-master-master cluster with galera and writing to all of them? In my experience it is important to only write to a single node in galera unless you've heavily tested multi-master-writing (sadly we have not).

It is unlikely that the caching is actually an issue here, it is likely that you are either invalidating the cache (by new events being issued), have a subtle difference in the event query happening on different keystones (resulting in a cache miss), or similar.

Since you are complaining of deadlocks, we can pretty much eliminate caching as the problem.

This bug should also not be "in-progress" if there has not been a patch posted.