When I invoke jboss:service MBean-List, I found the exception in jboss: 10:11:31,447 ERROR [JNDIView] JNDIView.getHAJndiAttributes() failed java.lang.NullPointerException: name cannot be null at javax.management.ObjectName.construct(ObjectName.java:342) at javax.management.ObjectName.(ObjectName.java:1304) at org.jboss.naming.JNDIView.getHAJndiAttributes(JNDIView.java:836) at org.jboss.naming.JNDIView.getHAUrl(JNDIView.java:811) at org.jboss.naming.JNDIView.list(JNDIView.java:193) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3990525#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...