By the look of things, it isn't the receiver that crashed but the machine generating state. That much state being around is entirely possible regardless of your cache mode. Just because you use invalidations doesn't mean that much state cannot exist in memory. Is this easily reproducible? How does machine A "crash"? Does the JVM exit? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4100727#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...