Does JBM support XA Datasources? This posting seems to indicate that I should not use an XA Datasource with JBM. http://www.jboss.org/index.html?module=bb&op=viewtopic&t=119217 I have an MDB that creates a timer using the EJB TimerServer. I have DefaultDS setup to use the Oracle XA driver and I have a non xa oracle datasource setup for JBM. When the MDB executes I get an javax.transaction.HeuristicMixedException. When I switch the TimerService to use the non xa datasource the exception goes away. However, this doesn't feel like the right solution. Can I use an XA datasource with JBM? My Environment: JBM 1.3 JAS 4.2 Oracle Stacktrace 2008-01-03 15:12:31,076 ERROR [org.jboss.resource.adapter.jms.inflow.JmsServerSession] org.jboss.resource.adapter.jms.inflow.JmsServerSession@1f6a5e9 failed to commit/rollback | javax.transaction.HeuristicMixedException | at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1264) | at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:135) | at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:87) | at org.jboss.resource.adapter.jms.inflow.JmsServerSession$XATransactionDemarcationStrategy.end(JmsServerSession.java:494) | at org.jboss.resource.adapter.jms.inflow.JmsServerSession.run(JmsServerSession.java:248) | at org.jboss.resource.work.WorkWrapper.execute(WorkWrapper.java:204) | at org.jboss.util.threadpool.BasicTaskWrapper.run(BasicTaskWrapper.java:275) | at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:743) | at java.lang.Thread.run(Thread.java:595) | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4116896#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...