Hi I am using EJB3 MDBs on JBoss 4.0.4 application server. Since the onMessage method takes a lot of time to complete, I was getting the below warning, WARN [TransactionImpl] Transaction TransactionImpl:XidImpl[FormatId=257, GlobalId=OPGX745-FYKH3D1/1, BranchQual=, localId=1] timed out. status=STATUS_ACTIVE So I referred the EJB specs and as per the specs if I make the MDB to not support transaction(TransactionAttributeType.NOT_SUPPORTED) or make it a BMT and set the acknowledgement mode to auto-acknowledge then the message is acknowledged once its delivered to the onMessage method and it does not depend on the BMT transaction in the method. I tried both the transaction not supported and the BMT but I still get the above warning and also the message is redelivered. Below is the code for the MDB, @MessageDriven(activationConfig = { @ActivationConfigProperty(propertyName="destinationType", propertyValue="javax.jms.Queue"), @ActivationConfigProperty(propertyName="destination", propertyValue="SonicJMS/Queues/datahub"), @ActivationConfigProperty(propertyName="providerAdapterJNDI", propertyValue="java:/SonicJMSProvider"), @ActivationConfigProperty(propertyName="useDLQ", propertyValue="false"), @ActivationConfigProperty(propertyName="acknowledgeMode", propertyValue="Auto-acknowledge") }) @TransactionManagement(TransactionManagementType.CONTAINER) public class FeedParsingManager implements MessageListener { @EJB private EmailNotification emailSender; @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED) public void onMessage(Message msg) { .... .... .... } } The onMessage method calls a stateless session bean which is a BMT. Why am I seeing the warning message and message being redelivered? Thanks in advance, Rajeev View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4120941#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...