I just switched from messaging 1.0.1CR5 to 1.0.1SP2 because the old version would consistently silently stop sending messages on certain queues under load. Now with SP2 I get an error on my client, but nothing on the server. After 20-60 minutes of running under load, I get the following exception on one of my clients. I'm not sure how to pull this out into a test case since it is a large code base, but any ideas on what could cause this? org.jboss.aop.NotFoundInDispatcherException: Object with oid: -2147483628 was not found in the Dispatcher at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:85) at org.jboss.jms.server.remoting.JMSServerInvocationHandler.invoke(JMSServerInvocationHandler.java:127) at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:1014) at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:508) at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:645) at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:293) at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:172) at org.jboss.remoting.Client.invoke(Client.java:607) at org.jboss.remoting.Client.invoke(Client.java:599) at org.jboss.jms.client.delegate.DelegateSupport.invoke(DelegateSupport.java:111) at org.jboss.jms.client.delegate.ClientSessionDelegate$acknowledge_354868566256058116.invokeNext(ClientSessionDelegate$acknowledge_354868566256058116.java) at org.jboss.jms.client.container.ClosedInterceptor.invoke(ClosedInterceptor.java:182) at org.jboss.aop.advice.PerInstanceInterceptor.invoke(PerInstanceInterceptor.java:117) at org.jboss.jms.client.delegate.ClientSessionDelegate$acknowledge_354868566256058116.invokeNext(ClientSessionDelegate$acknowledge_354868566256058116.java) at org.jboss.jms.client.container.ExceptionInterceptor.invoke(ExceptionInterceptor.java:69) at org.jboss.jms.client.delegate.ClientSessionDelegate$acknowledge_354868566256058116.invokeNext(ClientSessionDelegate$acknowledge_354868566256058116.java) at org.jboss.jms.client.container.ClientLogInterceptor.invoke(ClientLogInterceptor.java:107) at org.jboss.jms.client.delegate.ClientSessionDelegate$acknowledge_354868566256058116.invokeNext(ClientSessionDelegate$acknowledge_354868566256058116.java) at org.jboss.jms.client.delegate.ClientSessionDelegate.acknowledge(ClientSessionDelegate.java) at org.jboss.jms.client.container.SessionAspect.handlePostDeliver(SessionAspect.java:218) at org.jboss.aop.advice.org.jboss.jms.client.container.SessionAspect6.invoke(SessionAspect6.java) at org.jboss.jms.client.delegate.ClientSessionDelegate$postDeliver_5319211143798977162.invokeNext(ClientSessionDelegate$postDeliver_5319211143798977162.java) at org.jboss.jms.client.container.ClosedInterceptor.invoke(ClosedInterceptor.java:182) at org.jboss.aop.advice.PerInstanceInterceptor.invoke(PerInstanceInterceptor.java:117) at org.jboss.jms.client.delegate.ClientSessionDelegate$postDeliver_5319211143798977162.invokeNext(ClientSessionDelegate$postDeliver_5319211143798977162.java) at org.jboss.jms.client.container.ExceptionInterceptor.invoke(ExceptionInterceptor.java:69) at org.jboss.jms.client.delegate.ClientSessionDelegate$postDeliver_5319211143798977162.invokeNext(ClientSessionDelegate$postDeliver_5319211143798977162.java) at org.jboss.jms.client.container.ClientLogInterceptor.invoke(ClientLogInterceptor.java:107) at org.jboss.jms.client.delegate.ClientSessionDelegate$postDeliver_5319211143798977162.invokeNext(ClientSessionDelegate$postDeliver_5319211143798977162.java) at org.jboss.jms.client.delegate.ClientSessionDelegate.postDeliver(ClientSessionDelegate.java) at org.jboss.jms.client.remoting.MessageCallbackHandler.postDeliver(MessageCallbackHandler.java:162) at org.jboss.jms.client.remoting.MessageCallbackHandler.receive(MessageCallbackHandler.java:448) at org.jboss.jms.client.container.ReceiverAspect.handleReceive(ReceiverAspect.java:63) at org.jboss.aop.advice.org.jboss.jms.client.container.ReceiverAspect24.invoke(ReceiverAspect24.java) at org.jboss.jms.client.delegate.ClientConsumerDelegate$receive_N8299950230150603585.invokeNext(ClientConsumerDelegate$receive_N8299950230150603585.java) at org.jboss.jms.client.container.ClosedInterceptor.invoke(ClosedInterceptor.java:182) at org.jboss.aop.advice.PerInstanceInterceptor.invoke(PerInstanceInterceptor.java:117) at org.jboss.jms.client.delegate.ClientConsumerDelegate$receive_N8299950230150603585.invokeNext(ClientConsumerDelegate$receive_N8299950230150603585.java) at org.jboss.jms.client.container.ExceptionInterceptor.invoke(ExceptionInterceptor.java:69) at org.jboss.jms.client.delegate.ClientConsumerDelegate$receive_N8299950230150603585.invokeNext(ClientConsumerDelegate$receive_N8299950230150603585.java) at org.jboss.jms.client.container.ClientLogInterceptor.invoke(ClientLogInterceptor.java:107) at org.jboss.jms.client.delegate.ClientConsumerDelegate$receive_N8299950230150603585.invokeNext(ClientConsumerDelegate$receive_N8299950230150603585.java) at org.jboss.jms.client.delegate.ClientConsumerDelegate.receive(ClientConsumerDelegate.java) at org.jboss.jms.client.JBossMessageConsumer.receive(JBossMessageConsumer.java:86) at dealcatcher.kolinka.jms.JMSReceiver.receive(JMSReceiver.java:57) at dealcatcher.kolinka.indexer.IndexReceiver.receive(IndexReceiver.java:45) at dealcatcher.kolinka.indexer.IndexServer.run(IndexServer.java:120) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3996700#... 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