I am new to Jboss, so I expect that I have missed something in configuration. So please do help me because your 5 min. will save my days. The war file, I am doploying, has nothing to do with JMS. Steps: 1- took virgine Jboss setup in two different nodes with different IPs say IP1 and IP2 with port 8080. 2- placed my war file in jboss-4.2.2.GA\server\all\deploy-hasingleton directory. 3- added the following dependency in $JBOSS_HOME/server/all/deploy/deploy-hasingleton-service.xml in BarrierController MBean. jboss.ha:service=HASingletonDeployer, type=Barrier 4- started jboss, using "run -c all -b IP1" on node1 and "run -c all -b IP2" on node2. problems 1- I get an ERROR on Jboss console. 16:27:17,192 ERROR [URLDeploymentScanner] Incomplete Deployment listing: --- MBeans waiting for other MBeans --- ObjectName: jboss.ha:service=HASingletonDeployer,type=BarrierController State: CONFIGURED I Depend On: jboss.ha:service=HASingletonDeployer,type=Barrier --- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM --- ObjectName: jboss.ha:service=HASingletonDeployer,type=Barrier State: NOTYETINSTALLED Depends On Me: jboss.ha:service=HASingletonDeployer,type=BarrierController 2-Although I am able to access the web application from browser, but I am sure that the cluster is not in HASingleton mode (one master and rest standby) since I can run application by using both http://IP1:8080/<app name>/ for node 1 and http://IP2:8080/<app name>/ for node 2. And if I shut down an instance of JBoss then corresponding URL down not work. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4176019#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...