When I tried to run twiddle set, I got the following error msgs: ./twiddle.sh set jboss.jca:name=CatalogDB,service=ManagedConnectionPool MaxSize 300 ********************************************************************************************************* 18:07:39,287 ERROR [Twiddle] Exec failed java.lang.reflect.UndeclaredThrowableException at $Proxy0.getMBeanInfo(Unknown Source) at org.jboss.console.twiddle.command.SetCommand.execute(SetCommand.java:146) at org.jboss.console.twiddle.Twiddle.main(Twiddle.java:288) Caused by: java.io.NotSerializableException: org.jboss.resource.connectionmanager.JBossManagedConnectionPool$OnePool at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291) at java.util.HashMap.writeObject(HashMap.java:985) 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:890) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073) at java.io.ObjectOutputStream.access$100(ObjectOutputStream.java:135) at java.io.ObjectOutputStream$PutFieldImpl.writeFields(ObjectOutputStream.java:1512) at java.io.ObjectOutputStream.writeFields(ObjectOutputStream.java:418) at javax.management.modelmbean.DescriptorSupport.writeObject(DescriptorSupport.java:1392) 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:890) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369) at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:380) at javax.management.modelmbean.ModelMBeanAttributeInfo.writeObject(ModelMBeanAttributeInfo.java:536) 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:890) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073) at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1245) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1069) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291) at java.rmi.MarshalledObject.(MarshalledObject.java:92) at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:364) at sun.reflect.GeneratedMethodAccessor78.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$1.run(Transport.java:153) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:149) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701) 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:126) at org.jboss.invocation.jrmp.server.JRMPInvoker_Stub.invoke(Unknown Source) at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:135) at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:96) at org.jboss.jmx.connector.invoker.client.InvokerAdaptorClientInterceptor.invoke(InvokerAdaptorClientInterceptor.java:60) at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:55) at org.jboss.proxy.ClientMethodInterceptor.invoke(ClientMethodInterceptor.java:55) at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:85) ... 3 more ******************************************************************************************************* I can get the Maxisize information using: ./twiddle.sh get jboss.jca:name=CatalogDB,service=ManagedConnectionPool MaxSize MaxSize=200 I can also update the jboss.jca:name=CatalogDB,service=ManagedConnectionPool MaxSize parameter using the JMX web console. But I cannot do it with twiddle, how to fix it? Any help is highly appreciated, Thank you, Zhenzhen View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4059761#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...