Hi Brian, I haven't gone through all the tests yet , I'll do that and will get back to you.. In the meanwhile I tried setting up a cluster instance as follows a) 2 instances of jboss 5.0.0 GA running in my local machine(2 instances in the same machine). b) I've generated 2 different IP addresses using microsoft loop back adaptor. c) Started my servers with the -c , -b and ServerPeerID options. d) In the application ,I've ejb 3.0 stateless session beans trying to connect to jboss cache. e) The cluster is set up in the 2 instances , as the message is displayed as expected. i) but in the jboss cache displays the message anonymous wrote : WARN [TxInterceptor] Commit failed. Clearing stale locks. And the cache data is not available in the database.Is this error because of the loop back adapter? 2) how is setting up a loop back adaptor different from using 2 ip address of the localhost(one LAN IP and the otherone for the wireless) . Without the loop hole adaptor , cluster does not get formed. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4215582#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...