No, it's max_bytes *not* desired_avg_gossip ! Try one of the standard configs shipped with your version, e.g. udp.xml View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4181401#4181401 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4181401