thanks for your info. Looks like my client failed for reason. BTW, DO you have any idea on failover cluster? While trying to setup a new JBoss apps, I come across with failover clustering, does anyone have any advices on this, other than the link at Jboss doc: Chapter 16. Clustering http://docs.jboss.org/jbossas/jboss4guide/r4/html/cluster.chapt.html & http://wiki.jboss.org/wiki/JBossHA ? Any simple hello world exmple? Or anyone know this: http://wiki.jboss.org/wiki/BasicClusterTest ? It seems simple but nothing there. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4162629#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...