Multiple JBC instances can and will participate in the same JTA transaction. E.g., | tx.begin() | cache1.put(...) | cache2.remove(...) | cache3.put(...) | tx.commit() | will work. Not sure I understand your problem about not being able to do replication. Do you run out of memory when trying to commit such a transaction? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4228582#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...