Thanks Alex, that's what I was doing and your suggestion in fact did help. Now the server starts up without any problem but throws exception when doing the JMX MBean Operation Result list(). Here is the exception stacks: | 22:00:25,266 ERROR [JNDIView] JNDIView.getHAJndiAttributes() failed | java.lang.NullPointerException: name cannot be null | at javax.management.ObjectName.construct(ObjectName.java:342) | at javax.management.ObjectName.<init>(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) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:585) | at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) | at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) | at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133) | at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) | at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142) | at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) | at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) | at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) | at org.jboss.jmx.adaptor.control.Server.invokeOpByName(Server.java:258) | at org.jboss.jmx.adaptor.control.Server.invokeOp(Server.java:223) | at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.invokeOp(HtmlAdaptorServlet.java:262) | at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.processRequest(HtmlAdaptorServlet.java:100) | at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.doPost(HtmlAdaptorServlet.java:82) | at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) | at javax.servlet.http.HttpServlet.service(HttpServlet.java:810) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) | at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175) | at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) | at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) | at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) | at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) | at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) | at java.lang.Thread.run(Thread.java:595) | | any idea what's cauing this? what's the resolution or wayaround it? by the way I have not downloaded the jems installer you have suggested.hopefully this is not the cause. | | thanks. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3970254#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...