I have developed a CustomMulticastDetector in order to solve my problem. Debugging JBoss Remoting code, I have seen that MulticastDetector has implemented a listener behavior without time delay [ while(running) { ... } // running = true ]. My CustomMulticastDetector introduces this missing delay (using Timer and TimerTask) and it doesn't run! My client detects when some server has been launched, but not when has got down! Is fast-multicast necessary for correct operation? Thanks again! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4149120#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...