Hi Manik, Previously there were 3 to 4 deployments os same application were there on different machines but with same JBoss xml configurations. But after getting these problems, I changed multicast address & cluster name in all deployments. I have also tried JGroups Demo Program and it is working fine. Do you think I am missing anything now anything in configuration and steps to use with hibernate? Thanks & Regards, Narendra Gupta View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117265#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...