Use FRAG2 instead of FRAG in your protocol stack. See http://wiki.jboss.org/wiki/Wiki.jsp?page=JGroupsFRAG2 . View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4079162#4079162 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4079162