Thanks for the tip. I too was thinking of upgrading to a release version of JGroups but wanted to ensure compatibility. The upgrade matrix link that you provided is useful in that regard. Based on the compatibility matrix between JBoss cache and JGroups as shown here, i checked out the JGroups download site and they have 2.2.9.3 as the latest. I am assuming 2.2.9.x to mean 2.2.9.* right? JBoss Cache/ Ships with JGroups/ Runs with JGroups 1.2.3 / 2.2.8 / 2.2.7.x, 2.2.9.1, 2.2.9.x Thanks Ramdas View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4065544#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...