Let's say I am working on a trading application, ask orders against bid orders, when there is an order match there is a deal. The point is that I can't take any chance there. If the order is there I don't want any other cache instance to pull it out. I prefer all the instances to lock, proceed and then go on. The safety factor is very important here. Regards Roman View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4269303#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...