The following change has been made to the behavior of reused InvokerCallbackHandlers: anonymous wrote : | ServerInvoker stores the client side InvokerCallbackHandler using a key consisting of the sessionId of the Client that is registering the InvokerCallbackHandler concatenated with the InvokerCallbackHandler's listenerId. When ServerInvoker is asked to unregister a client side InvokerCallbackHandler X, it looks for X based on the sessionId of the Client making the request concatenated with the listenerId of X. When a Client other than the one that registered InvokerCallbackHandler X tries to unregister X, the ServerInvoker can't find X. It follows that a Client can unregister only those InvokerCallbackHandlers that it has registered. | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3991857#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...