We were using , clustered-hsqldb-persistence-service.xml. I think that was the problem.After changing it to mysql db , mysql-persistence-service.xml.It started working fine. In any case we can use clustered-hsqldb-persistence-service.xml for clustered environment ? if not then why we have it we already have hsqldb-persistence-service.xml file. thx Awaiting for positive reply View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4199146#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...