Thank you Chuck, What I understand know is that, you can only retrieve primitive values. In the same way, I was trying to retrieve a "org.apache.catalina.Context" from the MBean "Catalina:J2EEApplication=none,J2EEServer=none,j2eeType=WebModule,name=//localhost/" using the JMX operation operation "findMappingObject" and I get the following error
Caused by: java.rmi.UnmarshalException: error unmarshalling return; nested exception is: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.apache.catalina.util.LifecycleSupport at sun.rmi.server.UnicastRef.invoke(Unknown Source) at com.sun.jmx.remote.internal.PRef.invoke(Unknown Source) at javax.management.remote.rmi.RMIConnectionImpl_Stub.invoke(Unknown Source) at javax.management.remote.rmi.RMIConnector$RemoteMBeanServerConnection.invoke(Unknown Source) My suggestion: - If you want to expose a JMX object all of their attributes or operations have to be serializable. - Provide a different set of interface for Remote JMX connection and local JMX connection. - Add to the documentation a list of objects that can be retrieved Regards, Emmanuel On 11/4/08, Caldarale, Charles R <[EMAIL PROTECTED]> wrote: > > > From: Emmanuel Soden [mailto:[EMAIL PROTECTED] > > Subject: Re: [JMX] org.apache.catalina.session.StandardManager not > serializable > > > > Using Tomcat 5.5.27 with JDK 1.5.0_11, I'm trying to retrieve > > the attribute "manager" from the MBean > > "Catalina:J2EEApplication=none,J2EEServer=none, > > j2eeType=WebModule,name=//localhost/". > > I don't think there's any requirement for any app to guarantee that > attributes are serializable, and I suspect trying to make StandardManager so > would create a host of issues inside Tomcat. > > Perhaps you should try retrieving the attributes you're interested in from > this JMX location instead: > "Catalina:type=Manager,path=/,host=localhost" > Its attributes are all retrievable, at least according to JConsole. > > > when I try to retrieve an attribute like "managedResource" > > from the MBean "Catalina:host=localhost,type=Host" > > From a brief perusal of the 6.0 code (sorry, not the level you're using), > there appears to be extremely limited use of the "managedResource" > attribute, despite its presence in most of the MBeans. Looks like in the > vast majority of cases, the attribute is never set. > > - Chuck > > > THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY > MATERIAL and is thus for use only by the intended recipient. If you received > this in error, please contact the sender and delete the e-mail and its > attachments from all computers. > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
