What I'm trying to do is very simple, which is using twiddle.sh to query some MBean info and their attribute values to reach the same goal as my going to the JBoss JMX console to get all I need. My understanding is that the fix would bypass the Serializable issue and make me go through to get any attribute value I need. And it seems this is not the case in the most recent versions including 4.2.2 GA. The following shows what I tried to do here: 1) Get the attribute value for Server Info and I got it as follows: bash-2.05# ./twiddle.sh -s yyangxp:1099 get jboss.system:type=ServerInfo HostAddress=192.168.175.45 AvailableProcessors=2 OSArch=sparc OSVersion=5.9 HostName=camaro JavaVendor=Sun Microsystems Inc. JavaVMName=Java HotSpot(TM) Server VM FreeMemory=68600432 ActiveThreadGroupCount=9 TotalMemory=133103616 JavaVMVersion=1.5.0_08-b03 ActiveThreadCount=117 JavaVMVendor=Sun Microsystems Inc. OSName=SunOS MaxMemory=531628032 JavaVersion=1.5.0_08 2) Get the attribute value for ThreadPool info and I failed as follows: bash-2.05# ./twiddle.sh -s yyangxp:1099 get jboss.system:service=ThreadPool 08:41:37,451 ERROR [Twiddle] Exec failed java.io.NotSerializableException: org.jboss.util.threadpool.BasicThreadPool at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1081) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302) at java.util.ArrayList.writeObject(ArrayList.java:569) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:917) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1339) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302) at java.rmi.MarshalledObject.(MarshalledObject.java:92) at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:424) at sun.reflect.GeneratedMethodAccessor104.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294) at sun.rmi.transport.Transport$1.run(Transport.java:153) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:149) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:466) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:707) at java.lang.Thread.run(Thread.java:595) at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:247) at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:133) at org.jboss.invocation.jrmp.server.JRMPInvoker_Stub.invoke(Unknown Source) at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:133) at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:331) at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:194) at org.jboss.jmx.connector.invoker.client.InvokerAdaptorClientInterceptor.invoke(InvokerAdaptorClientInterceptor.java:66) at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70) at org.jboss.proxy.ClientMethodInterceptor.invoke(ClientMethodInterceptor.java:74) at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100) at $Proxy1.getAttributes(Unknown Source) at org.jboss.console.twiddle.command.GetCommand.execute(GetCommand.java:168) at org.jboss.console.twiddle.Twiddle.main(Twiddle.java:305) So the real question is "Is there any workaround I can get non serializable MBean attribute values remotely?". I noticed you or someone else posted something at http://jira.jboss.com/jira/browse/JBAS-4323, which seems to be able to resolve the issue I have. But I have no idea how to apply this patch into my JBoss environment to make it work. Your further advice is very much appreciated! -Yichong View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4138975#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...