Note that you should be able to test session replication with 2 JBoss instances on one box if you use the ServiceBindingManager to ensure both processes use different ports. See http://wiki.jboss.org/wiki/Wiki.jsp?page=ReplicatedCounter . Key point is the hostname portion of the URL must be the same for both AS instances. Otherwise, the browser will not present the session cookie to the second AS instance when you test failover. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4083439#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...