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?