The recent name changes in HHH-12620 Closed (update JBossStandAloneJtaPlatform) show that a failure in initializing the JTA integration will result in the Persistence Unit to not boot yet give no error message or any clue about the reason for failing.

For example an application having a PU named "quickstart-persistence-unit" and using Narayana Standalone would work fine with 5.3.0.Final yet print a puzzling error on 5.3.1.Final

javax.persistence.PersistenceException: No Persistence provider for EntityManager named quickstart-persistence-unit