"rengar" wrote : One difference is that session always is xxxxxxxxxxxxxxxxx.node1. Don't change name node. Do you mean with AS 4.2.3 it's always xxxxxxxxxxxx.node1? Even after you shut down node1? If so, do you have "UseJK" set to "true" in your 4.2.3 deploy/jboss-web-deployer/META-INF/jboss-service.xml file? You should. I want to start with this issue because always keeping .node1 is not the expected behavior; it should change after failover like it did with AS 5 in your steps 1, 2, 3. If you can make that happen in 4.2.3 and then you see the same "bad" behavior that tells me it is an issue with how mod_proxy deals with the jvmRoute suffix. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4205079#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...