Thanks. so if we use below config then Barrier will be in start state in only in one node? <mbean code="org.jboss.system.BarrierController" name="efe.ha:service=HASingletonController_1,type=BarrierController"> | <!-- Dependent services will depend on this mbean --> | <attribute name="BarrierObjectName">efe.ha:service=HASingletonController_1,type=Barrier</attribute> | <!-- Whether to subscribe for notifications after startup --> | <attribute name="DynamicSubscriptions">false</attribute> .... Also, when Barrier starts does it deliver some kind of notification to the service or it just starts? As I understand Barrier is used for those services that don't follow services lifecycle like start/stop. So how does Barrier is able to stop or start those services like EJB, MDB? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4188296#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...