Where does ""jboss.cache:service=TreeCache-Group" come from? AFAICT the only place the serviceName field is set is in preRegister, and that should be the value WAS is passing in. Or is WAS passing in "jboss.cache:service=TreeCache-Group" to preRegister but actually registering it under something else? And then createService tries to register it as "jboss.cache:service=TreeCache-Group" and WAS barfs because the same object is registered under a different name? Re: the interceptors, the order of the attributes is not important; it's OK to mix them. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4038152#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...