I was getting the following error: | 2008-08-21 00:37:39,572 [JMS SessionPool Worker-24] WARN com.arjuna.ats.jta.logging.loggerI18N - [com.arjuna.ats.internal.jta.resou | rces.arjunacore.preparefailed] [com.arjuna.ats.internal.jta.resources.arjunacore.preparefailed] XAResourceRecord.prepare - prepare f | ailed with exception XAException.XA_RETRY | 2008-08-21 00:37:39,572 [JMS SessionPool Worker-24] WARN com.arjuna.ats.arjuna.logging.arjLoggerI18N - [com.arjuna.ats.arjuna.coord | inator.BasicAction_50] - Prepare phase of action -53eef977:8064:48ad0dd3:d296c received heuristic decision: TwoPhaseOutcome.HEURISTI | C_HAZARD | 2008-08-21 00:37:39,572 [JMS SessionPool Worker-24] WARN com.arjuna.ats.arjuna.logging.arjLoggerI18N - [com.arjuna.ats.arjuna.coord | inator.BasicAction_36] - BasicAction.End() - prepare phase of action-id -53eef977:8064:48ad0dd3:d296c failed. | 2008-08-21 00:37:39,572 [JMS SessionPool Worker-24] WARN com.arjuna.ats.arjuna.logging.arjLoggerI18N - [com.arjuna.ats.arjuna.coord | inator.BasicAction_37] - Received heuristic: TwoPhaseOutcome.HEURISTIC_HAZARD . | 2008-08-21 00:37:39,572 [JMS SessionPool Worker-24] WARN com.arjuna.ats.arjuna.logging.arjLoggerI18N - [com.arjuna.ats.arjuna.coord | inator.BasicAction_38] - Action Aborting | This was being thrown from an MDB. I increased the -Xss jvm size to 512K and the problem seems to have been resolved. What things might cause the error above? Could memory issues cause the problem above? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171846#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...