Adrian Brock [http://community.jboss.org/people/adrian%40jboss.org] replied to the discussion "MDB - JCA Transaction issue" To view the discussion, visit: http://community.jboss.org/message/533748#533748 -------------------------------------------------------------- " 14:03:04,783 ERROR [STDERR] javax.transaction.SystemException: TransactionImple.enlistResource - XAResource.start [com.arjuna.ats.internal.jta.transaction.arjunacore.couldnotregister] [com.arjuna.ats.internal.jta.transaction.arjunacore.couldnotregister] could not register transaction: < 131075, 27, 25, 49454553511011004849515658551004958529897491015052101585110045535110110048495156585510049585298974910150521015855101 > 14:03:04,783 ERROR [STDERR]  at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.enlistResource(TransactionImple.java:870) 14:03:04,783 ERROR [STDERR]  . " This says that XAResource.start() threw an error, but you don't post what that error was. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/533748#533748] Start a new discussion in JCA at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]