🐛 [Bug] Neo4j error on production cluster

Created by: Tirokk

Authored by mattwr18 Nov 5, 2019 Closed Nov 7, 2019

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🐛 Bugreport

we are getting this error at least 3 times a day on our production cluster for the last week.

ERROR Unable to schedule bolt session 'bolt-264322' for execution since there are no available threads to serve it at the moment. You can retry at a later time or consider increasing max thread pool size for bolt connector(s).

I have found this open issue, which could be related https://github.com/neo4j/neo4j/issues/12014 It suggests that we should double check our code base for open session.run, with no closing session.close, and also says "If you're using transaction functions (i.e. Session.ReadTransaction and Session.WriteTransaction) you're mostly safe"

Short term, we could go through the code base and make sure all sessions are closed - I have seen three or more that don't seem to be.

We could also open a refactoring ticket after to use `read/writeTransaction.