Thanks for the response. I am using JBoss AS 4.2.2 and Java 1.5 (update 15) on Win XP. anonymous wrote : Are you sure that this is the reason why your EJB2.0 fails to deploy As far as I know, yes. There aren't any other stack traces present. The stack I posted previously was from the EJBDeployer's attempt to re-deploy the failed application, with JBoss' logging cranked up. Now that I've put the logging levels back to normal, I'm seeing WARN's and ERROR's again. Here is the first stack trace I get when started up JBoss (at WARN level). | 14:42:34,352 WARN [JMSContainerInvoker] JMS provider failure detected for CfgEventLogConsumer | java.lang.NullPointerException | at org.jboss.ejb.plugins.jms.DLQHandler.createService(DLQHandler.java:187) | at org.jboss.system.ServiceMBeanSupport.jbossInternalCreate(ServiceMBeanSupport.java:260) | at org.jboss.system.ServiceMBeanSupport.create(ServiceMBeanSupport.java:188) | at org.jboss.ejb.plugins.jms.JMSContainerInvoker.innerStartDelivery(JMSContainerInvoker.java:510) | at org.jboss.ejb.plugins.jms.JMSContainerInvoker.startService(JMSContainerInvoker.java:839) | at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289) | at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245) | at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:585) | at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) | at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) | at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) | at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) | at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) | at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978) | . . . | Then I get this at a regular interval (re-deployment attempts): | 14:46:05,963 INFO [JMSContainerInvoker] Waiting for reconnect internal 10000ms for CfgEventLogConsumer | 14:46:15,963 INFO [JMSContainerInvoker] Trying to reconnect to JMS provider for CfgEventLogConsumer | 14:46:15,963 ERROR [JMSContainerInvoker] Reconnect failed: JMS provider failure detected for CfgEventLogConsumer | java.lang.NullPointerException | at org.jboss.ejb.plugins.jms.DLQHandler.createService(DLQHandler.java:187) | at org.jboss.system.ServiceMBeanSupport.jbossInternalCreate(ServiceMBeanSupport.java:260) | at org.jboss.system.ServiceMBeanSupport.create(ServiceMBeanSupport.java:188) | at org.jboss.ejb.plugins.jms.JMSContainerInvoker.innerStartDelivery(JMSContainerInvoker.java:510) | at org.jboss.ejb.plugins.jms.JMSContainerInvoker$ExceptionListenerImpl$ExceptionListenerRunnable.run(JMSContainerInvoker.java:1428) | at java.lang.Thread.run(Thread.java:595) | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4145619#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...