As an update I ran the clustered entity example provided in ejb3 RC9 Patch under the same jboss configuration and it works fine, the information is not removed from the treecache nodes. The only difference from my seems to be that after calling persist or merge methods I also call flush for this tables. Can this affect the eviction of the cache? I wasn't able to find any reference to this in all the documentation that I have been reading. Does anybody have an idea of this behaviour? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4199562#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...