Another discussed possibility would be to make delegates and failoverMaps static (somehow in a HashMap by uniqueId) and intercept serialization calls (like write/readExternal) to inject the CF in a CallbackManager but we would still need the singleton CallbackManager for this... so I'm not going to use this idea but i wanted to keep it registered here on the forum as a brain storm possibility. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4001857#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...