"TransactionRequiredException: no transaction is in progress" during flush of application managed entity manager in JBoss EAP

Environment

• Red Hat JBoss Enterprise Application Platform (EAP)
  • 7.2
  • 7.3
• Hibernate
  • 5.3

Issue

• An application managed entity manager is created.

• A JTA transaction is initiated (e.g. during a CMT or BMT context)

• During EntityManager.flush() an exception is raised

  ... javax.persistence.TransactionRequiredException: no transaction is in progress
  

• No exception occurred in Hibernate 5.1 / EAP 7.1.

Resolution

• This issue¹ is resolved in This content is not included.EAP 7.3 cumulative patch (CP) 3 and later releases. Production systems should use the latest available cumulative patch.
• As a workaround, EntityManager.joinTransaction() may be called explicitly before calling flush().

Root Cause

This is a known defect (Content from hibernate.atlassian.net is not included.HHH-13936).

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