Hi, I recently tried setting up 3 machines in a JBoss cluster that were ALSO in a Windows Network Load Balancing (NLB) cluster. I attempted this because I figured NLB would give me a virtual IP address that I can use to load balance HTTP requests to members of the JBoss cluster (serving out functionality via stateless session beans and web services) This seems to have failed miserably; Jboss locks up on startup and exhibits other strange behavior until I turn off NLB. Is this Not A Good Idea or otherwise Officially Not Supported? If all I want is HTTP load balancing for fault tolerance (high availability), is a hardware load balancer probably my best option? I tried mod_jk and it seems ok, but now the machine running Apache represents the single point of failure. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4003107#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...