HHH-11097 Resolved highlights a problem in how Ehcache does some logging that may lead to very poor performance hit. For HHH-11097 Resolved we minimized the impact of this from the Hibernate side, but Ehcache is going to fix the logging and make the message even better anyway (it indicates a real underlying problem) in 2.10.3. We should update to that version for hibernate-ehcache.