"timfox" wrote : When you failover, non persistent messages would be lost. Therefore we can't just fail over to redistribute load, since people would get upset if suddenly their non persistent messages disappeared. Sorry, I still don't get your answer. The intention of failover over shutdown is not to redistristibute load. It is done to keep the service available. So users still can send messages without knowing that there is a maintenance take place. Shut down is done by administrators/operators. They know what will happen to non persistent messages when they shut down the server. I think it is unlikely that they will be surprised on their own action. Anyway, with or without failover, shut down a server will make non persistent messages dissapeared. Why is this failover going to make them upset? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4003768#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...