seyvet [https://community.jboss.org/people/seyvet] created the discussion "EnityManager.close() before or after JTA afterCompletion()?" To view the discussion, visit: https://community.jboss.org/message/794692#794692 -------------------------------------------------------------- Hi, See as a reference the https://community.jboss.org/message/794633#794633 thread. In an application server, that is JavaEE 6 compliant, which of EntityManager.close() and JTA Synchronization.afterCompletion() should be closed first? Based on the persistence specification: 7.9.1 Container Responsibilities: After the JTA transaction has completed (either by transaction commit or rollback), The container closes the entity manager by calling EntityManager.close. I am using DataNucleus (DN) 3.2 as a Persistence provider, and DN expects the Transaction afterCompletion() to be triggered BEFORE the EntityManager.close().  It seems that the opposite is triggered by JBoss.  So I wonder if both are correct or if one should be called before another based on either JTA or Persistence JSRs? Based on the thread dump, arjuna calls first: at org.datanucleus.api.jpa.JPAEntityManager.close(JPAEntityManager.java:194) at org.jboss.as.jpa.transaction.TransactionUtil$SessionSynchronization.afterCompletion(TransactionUtil.java:193) (EntityManager.close() is called first) Then JTA after completion: at org.datanucleus.TransactionImpl.internalPostCommit(TransactionImpl.java:563)             at org.datanucleus.JTATransactionImpl.afterCompletion(JTATransactionImpl.java:429)             at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.afterCompletion(SynchronizationImple.java:96) Thanks -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/794692#794692] Start a new discussion in JBoss Transactions Development at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]