In the same node if Host A updates key value "AAA" to "1" and Host B simultaneously updated key value "AAA" to "2" would Host A's value be "2" and B's be "1" after replication? The caches would become out of sync? So the solution is to use sync cache or switch to a INVALIDATION_ASYNC cache to inform both Hosts that they should go to other persistence to get the "real" value? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4213302#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...