Hi, we are using two Jboss servers (on two different Linux machines). Both JBoss servers are 4.2.2 and on one server we have JBoss Messaging 1.4.0SP3 installed. When we send simple message from one server (without Messaging) we got following exception (not, that we use spring's JMSTemplate) 2008-10-29 14:14:33,484 DEBUG [org.springframework.jms.connection.SingleConnectionFactory] Could not close shared JMS Connection | java.lang.NullPointerException | at org.jboss.jms.client.container.ClosedInterceptor.maintainRelatives(ClosedInterceptor.java:285) | at org.jboss.jms.client.container.ClosedInterceptor.invoke(ClosedInterceptor.java:165) | at org.jboss.aop.advice.PerInstanceInterceptor.invoke(PerInstanceInterceptor.java:105) | at org.jboss.jms.client.delegate.ClientConnectionDelegate$closing_2473194355759371067.invokeNext(ClientConnectionDelegate$closing_2473194355759371067.java) | at org.jboss.jms.client.delegate.ClientConnectionDelegate.closing(ClientConnectionDelegate.java) | at org.jboss.jms.client.JBossConnection.close(JBossConnection.java:131) | at org.springframework.jms.connection.SingleConnectionFactory.closeConnection(SingleConnectionFactory.java:364) | at org.springframework.jms.connection.SingleConnectionFactory.resetConnection(SingleConnectionFactory.java:302) | at org.springframework.jms.connection.SingleConnectionFactory.destroy(SingleConnectionFactory.java:293) | at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:151) | at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:456) | at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:434) | at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:407) | at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:854) | at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:832) | at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:795) | at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:361) | at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:70) | at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:3895) | at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4527) | at org.apache.catalina.core.ContainerBase.destroy(ContainerBase.java:1163) | at org.apache.catalina.core.StandardContext.destroy(StandardContext.java:4617) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) | at java.lang.reflect.Method.invoke(Unknown Source) | at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:296) | at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164) | at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) | at org.jboss.web.tomcat.service.TomcatDeployer.performUndeployInternal(TomcatDeployer.java:454) | at org.jboss.web.tomcat.service.TomcatDeployer.performUndeploy(TomcatDeployer.java:425) | at org.jboss.web.AbstractWebDeployer.stop(AbstractWebDeployer.java:422) | at org.jboss.web.WebModule.stopModule(WebModule.java:100) | at org.jboss.web.WebModule.stopService(WebModule.java:66) | at org.jboss.system.ServiceMBeanSupport.jbossInternalStop(ServiceMBeanSupport.java:315) | at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:247) | at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) | at java.lang.reflect.Method.invoke(Unknown Source) | 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) | at $Proxy0.stop(Unknown Source) | at org.jboss.system.ServiceController.stop(ServiceController.java:508) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) | at java.lang.reflect.Method.invoke(Unknown Source) | 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.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) | at $Proxy44.stop(Unknown Source) | at org.jboss.web.AbstractWebContainer.stop(AbstractWebContainer.java:498) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) | at java.lang.reflect.Method.invoke(Unknown Source) | at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) | at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) | at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133) | at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) | at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142) | at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:97) | at org.jboss.system.InterceptorServiceMBeanSupport.invokeNext(InterceptorServiceMBeanSupport.java:238) | at org.jboss.wsf.container.jboss42.DeployerInterceptor.stop(DeployerInterceptor.java:98) | at org.jboss.deployment.SubDeployerInterceptorSupport$XMBeanInterceptor.stop(SubDeployerInterceptorSupport.java:196) | at org.jboss.deployment.SubDeployerInterceptor.invoke(SubDeployerInterceptor.java:99) | at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) | at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) | at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) | at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) | at $Proxy45.stop(Unknown Source) | at org.jboss.deployment.MainDeployer.stop(MainDeployer.java:667) | at org.jboss.deployment.MainDeployer.undeploy(MainDeployer.java:638) | at org.jboss.deployment.MainDeployer.shutdown(MainDeployer.java:516) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) | at java.lang.reflect.Method.invoke(Unknown Source) | at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) | at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) | at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133) | at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) | at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142) | at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) | at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) | at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) | at org.jboss.system.server.ServerImpl$ShutdownHook.shutdownDeployments(ServerImpl.java:1058) | at org.jboss.system.server.ServerImpl$ShutdownHook.shutdown(ServerImpl.java:1033) | at org.jboss.system.server.ServerImpl$ShutdownHook.run(ServerImpl.java:996) Maybe this is not jboss issue (maybe spring), but when we send message from JBoss installed on Windows it work fine. 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