I came to the conclusion that TreeCache is not serializable, which would be strange if true... Which is why I posted the other topic "is TreeCache serializable". When binding TreeCache, its an empty object. So the process is: 1. In my weblogic startup class, I bind an EMPTY TreeCache object. Invoke createService() and startService() 2. In my applicatoin code, I am simply looking up this TreeCache object - and it throws an exception. | Caused by: javax.naming.ConfigurationException [Root exception is java.rmi.MarshalException: error marshalling return; nested exception is: | java.io.NotSerializableException: org.jboss.cache.TreeCache] | at weblogic.jndi.internal.ExceptionTranslator.toNamingException(ExceptionTranslator.java:45) | at weblogic.jndi.internal.ExceptionTranslator.toNamingException(ExceptionTranslator.java:77) | at weblogic.jndi.internal.WLContextImpl.translateException(WLContextImpl.java:418) | at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:374) | at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:359) | at javax.naming.InitialContext.lookup(InitialContext.java:347) | | With the same code, if I bind a TreeMap object instead, I am able to do the lookup. Am I missing something? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3966941#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...