why would you want to do this? Different cache cfgs? How do your cache cfgs vary? With such references, eviction will become a problem since even if an object is evicted from a cache it won't be gc'd unless all referencing objects are also evicted from the other cache. And as for cache loading, object references will break once they are persisted. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4091898#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...