it is threaddump base on jboss 5.1 and JBM 1.4.3 "WorkerThread#207[127.0.0.1:4778]" - Thread t@20663 java.lang.Thread.State: BLOCKED on org.jboss.jms.server.connectionmanager.SimpleConnectionManager@11fef77 owned by: Timer-12 at org.jboss.jms.server.connectionmanager.SimpleConnectionManager.unregisterConnection(SimpleConnectionManager.java:147) at org.jboss.jms.server.endpoint.ServerConnectionEndpoint.close(ServerConnectionEndpoint.java:440) at org.jboss.jms.server.endpoint.advised.ConnectionAdvised.org$jboss$jms$server$endpoint$advised$ConnectionAdvised$close$aop(ConnectionAdvised.java:63) at org.jboss.jms.server.endpoint.advised.ConnectionAdvised$close_N4742752445160157748.invokeTarget(ConnectionAdvised$close_N4742752445160157748.java) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:111) at org.jboss.jms.server.container.ServerLogInterceptor.invoke(ServerLogInterceptor.java:105) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) at org.jboss.jms.server.endpoint.advised.ConnectionAdvised.close(ConnectionAdvised.java) at org.jboss.jms.wireformat.CloseRequest.serverInvoke(CloseRequest.java:66) at org.jboss.jms.server.remoting.JMSServerInvocationHandler.invoke(JMSServerInvocationHandler.java:143) at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:891) at org.jboss.remoting.transport.socket.ServerThread.completeInvocation(ServerThread.java:744) - locked org.jboss.remoting.transport.socket.ServerThread@1236b96 at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:697) at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:551) at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:232) Locked ownable synchronizers: - None "WorkerThread#206[10.133.249.58:4076]" - Thread t@20640 java.lang.Thread.State: RUNNABLE at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(SocketInputStream.java:129) at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) at java.io.BufferedInputStream.read(BufferedInputStream.java:237) - locked java.io.BufferedInputStream@2fc94a at java.io.FilterInputStream.read(FilterInputStream.java:66) at org.jboss.remoting.transport.socket.ServerThread.readVersion(ServerThread.java:1038) at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:673) at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:551) at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:232) Locked ownable synchronizers: - None "WorkerThread#205[10.133.249.58:3067]" - Thread t@20639 java.lang.Thread.State: BLOCKED on org.jboss.jms.server.connectionmanager.SimpleConnectionManager@11fef77 owned by: Timer-12 at org.jboss.jms.server.connectionmanager.SimpleConnectionManager.registerConnection(SimpleConnectionManager.java:104) at org.jboss.jms.server.endpoint.ServerConnectionEndpoint.(ServerConnectionEndpoint.java:196) at org.jboss.jms.server.endpoint.ServerConnectionFactoryEndpoint.createConnectionDelegateInternal(ServerConnectionFactoryEndpoint.java:273) at org.jboss.jms.server.endpoint.ServerConnectionFactoryEndpoint.createConnectionDelegate(ServerConnectionFactoryEndpoint.java:171) at org.jboss.jms.server.endpoint.advised.ConnectionFactoryAdvised.org$jboss$jms$server$endpoint$advised$ConnectionFactoryAdvised$createConnectionDelegate$aop(ConnectionFactoryAdvised.java:108) at org.jboss.jms.server.endpoint.advised.ConnectionFactoryAdvised.createConnectionDelegate(ConnectionFactoryAdvised.java) at org.jboss.jms.wireformat.ConnectionFactoryCreateConnectionDelegateRequest.serverInvoke(ConnectionFactoryCreateConnectionDelegateRequest.java:91) at org.jboss.jms.server.remoting.JMSServerInvocationHandler.invoke(JMSServerInvocationHandler.java:143) at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:891) at org.jboss.remoting.transport.socket.ServerThread.completeInvocation(ServerThread.java:744) - locked org.jboss.remoting.transport.socket.ServerThread@1417c05 at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:697) at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:551) at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:232) Locked ownable synchronizers: - None "WorkerThread#204[10.133.249.22:33885]" - Thread t@20638 java.lang.Thread.State: RUNNABLE at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(SocketInputStream.java:129) at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) at java.io.BufferedInputStream.read(BufferedInputStream.java:237) - locked java.io.BufferedInputStream@15e5e0d at java.io.FilterInputStream.read(FilterInputStream.java:66) at org.jboss.remoting.transport.socket.ServerThread.readVersion(ServerThread.java:1038) at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:673) at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:551) at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:232) Locked ownable synchronizers: - None "Timer-12" - Thread t@19961 java.lang.Thread.State: WAITING on java.util.LinkedList@1b71452 at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:485) at org.jboss.messaging.util.OrderedExecutorFactory$ChildExecutor.shutdownAfterProcessingCurrentlyQueuedTasks(OrderedExecutorFactory.java:164) at org.jboss.jms.server.endpoint.ServerSessionEndpoint.localClose(ServerSessionEndpoint.java:1229) at org.jboss.jms.server.endpoint.ServerConnectionEndpoint.close(ServerConnectionEndpoint.java:388) at org.jboss.jms.server.connectionmanager.SimpleConnectionManager.cleanupForSessionID(SimpleConnectionManager.java:465) at org.jboss.jms.server.connectionmanager.SimpleConnectionManager.handleClientFailure(SimpleConnectionManager.java:200) - locked org.jboss.jms.server.connectionmanager.SimpleConnectionManager@11fef77 at org.jboss.jms.server.connectionmanager.SimpleConnectionManager.handleConnectionException(SimpleConnectionManager.java:237) at org.jboss.remoting.ConnectionNotifier.connectionLost(ConnectionNotifier.java:59) at org.jboss.remoting.Lease.notifyClientLost(Lease.java:211) at org.jboss.remoting.Lease.access$500(Lease.java:39) at org.jboss.remoting.Lease$LeaseTimerTask.run(Lease.java:250) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4264401#... 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