What would cause 'Unexpected error delivering message' error message to be thrown from an MDB ?

Issue

I'm seeing following exception in the server log. Could you please tell me what's the rootcause for this please ?

2013-11-12 11:29:28,704 ERROR [org.jboss.resource.adapter.jms.inflow.JmsServerSession] (WorkManager(2)-27) Unexpected error delivering message delegator->JBossMessage[1572922670416429242]:PERSISTENT, deliveryId=4
java.lang.reflect.UndeclaredThrowableException
    at $Proxy468.onMessage(Unknown Source)
    at org.jboss.resource.adapter.jms.inflow.JmsServerSession.onMessage(JmsServerSession.java:179)
    at org.jboss.jms.client.container.ClientConsumer.callOnMessageStatic(ClientConsumer.java:160)
    at org.jboss.jms.client.container.SessionAspect.handleRun(SessionAspect.java:831)
    at org.jboss.aop.advice.org.jboss.jms.client.container.SessionAspect_z_handleRun_2147220473.invoke(SessionAspect_z_handleRun_2147220473.java)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.jms.client.container.ClosedInterceptor.invoke(ClosedInterceptor.java:170)
    at org.jboss.aop.advice.PerInstanceInterceptor.invoke(PerInstanceInterceptor.java:86)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.jms.client.delegate.ClientSessionDelegate.run(ClientSessionDelegate.java)
    at org.jboss.jms.client.JBossSession.run(JBossSession.java:199)
    at org.jboss.resource.adapter.jms.inflow.JmsServerSession.run(JmsServerSession.java:236)
    at org.jboss.resource.work.WorkWrapper.execute(WorkWrapper.java:205)
    at org.jboss.util.threadpool.BasicTaskWrapper.run(BasicTaskWrapper.java:260)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:619)
Caused by: javax.transaction.RollbackException: [com.arjuna.ats.internal.jta.transaction.arjunacore.commitwhenaborted] [com.arjuna.ats.internal.jta.transaction.arjunacore.commitwhenaborted] Could not commit transaction.
    at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1435)
    at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:137)
    at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:75)
    at org.jboss.ejb3.mdb.inflow.MessageInflowLocalProxy.endTransaction(MessageInflowLocalProxy.java:464)
    at org.jboss.ejb3.mdb.inflow.MessageInflowLocalProxy.delivery(MessageInflowLocalProxy.java:321)
    at org.jboss.ejb3.mdb.inflow.MessageInflowLocalProxy.invoke(MessageInflowLocalProxy.java:152)
    ... 17 more
Caused by: java.lang.Throwable: setRollbackOnly called from:
    at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.setRollbackOnly(TransactionImple.java:392)
    at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.setRollbackOnly(BaseTransaction.java:195)
    at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.setRollbackOnly(BaseTransactionManagerDelegate.java:123)
    at org.hibernate.ejb.AbstractEntityManagerImpl.markAsRollback(AbstractEntityManagerImpl.java:421)
    at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:576)
    at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:614)
    at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:513)
    at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.beforeCompletion(SynchronizationImple.java:101)
    at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.beforeCompletion(TwoPhaseCoordinator.java:269)
    at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:89)
    at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:177)
    at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1423)
    ... 22 more