Alright, after many many hours of digging around, I found out the JBoss extension of the EJB3 MDB annotations from wiki. I cleared the jboss.xml and ejb-jar.xml file and used only the EJB3 annotations. My MDB now looks like: | @MessageDriven(name = "notificationMDB", activationConfig = { | @ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Topic"), | @ActivationConfigProperty(propertyName = "destination", propertyValue = "topic/notificationTopic"), | @ActivationConfigProperty(propertyName = "user", propertyValue = "user"), | @ActivationConfigProperty(propertyName = "password", propertyValue = "pass"), | @ActivationConfigProperty(propertyName = "noLocal", propertyValue = "true") }) | @ResourceAdapter("jms-ra.rar") | public class NotificationMDB extends BaseServiceBean implements MessageListener { | | public void onMessage(Message message) { | System.out.println(message.toString()); | } | | } | As you can see, I didn't configure it as Durable to test it out. It deployed fine without error, and it received a message okay. But then it gives out a nasty error: | 13:39:30,290 WARN connectionmanager.SimpleConnectionManager - A problem has been detected with the | connection to remote client 4co2mt-vld24e-exm5wy4h-1-exm5xes0-5. It is possible the client has exite | d without closing its connection(s) or there is a network problem. All connection resources correspo | nding to that client process will now be removed. | 13:39:30,300 ERROR util.ExceptionUtil - ConsumerEndpoint[-2147483628] close [4co2mt-vld24e-exm5wy4h- | 1-exm5yc1o-o] | java.lang.RuntimeException: Failed to obtain lock | at org.jboss.messaging.core.local.PointToMultipointRouter.remove(PointToMultipointRouter.jav | a:166) | at org.jboss.messaging.core.local.Topic.remove(Topic.java:126) | at org.jboss.messaging.core.local.CoreSubscription.disconnect(CoreSubscription.java:111) | at org.jboss.jms.server.endpoint.ServerConsumerEndpoint.close(ServerConsumerEndpoint.java:36 | 0) | at org.jboss.jms.server.endpoint.ServerConsumerEndpoint.remove(ServerConsumerEndpoint.java:5 | 43) | at org.jboss.jms.server.endpoint.ServerSessionEndpoint.close(ServerSessionEndpoint.java:403) | | at org.jboss.jms.server.endpoint.ServerConnectionEndpoint.close(ServerConnectionEndpoint.jav | a:300) | at org.jboss.jms.server.connectionmanager.SimpleConnectionManager.handleClientFailure(Simple | ConnectionManager.java:158) | at org.jboss.jms.server.connectionmanager.SimpleConnectionManager.handleConnectionException( | SimpleConnectionManager.java:208) | at org.jboss.remoting.ConnectionNotifier.connectionLost(ConnectionNotifier.java:46) | at org.jboss.remoting.Lease$LeaseTimerTask.execute(Lease.java:133) | at org.jboss.util.TimerQueue$TimerTaskLoop.run(TimerQueue.java:181) | at java.lang.Thread.run(Thread.java:595) | Caused by: java.lang.InterruptedException | at EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock$WriterLock.acquire(WriterP | referenceReadWriteLock.java:234) | at org.jboss.messaging.core.local.PointToMultipointRouter.remove(PointToMultipointRouter.jav | a:161) | ... 12 more | I always feeled that JBoss' products are very solid. But a easy MDB deployment is taking me days and still no clue. Very frustrated. Another thing is, I looked into the source code of SimpleConnectionManager, and it is a very short class. It apparently does not have a line 208. Seems that the source code in the download is not the one been compiled? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4008969#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...