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Info on Getting reference to JBoss MBean Server
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created by <a href="https://community.jboss.org/people/ragavendran_kb">Ragav Baskaran</a> in <i>Beginner's Corner</i> - <a href="https://community.jboss.org/message/749121#749121">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi, I'm trying to get reference to Jboss MBean server using the code snippet below. I'm invoking this in a JSP file which is present in a WAR file and deployed in default profile of Jboss. </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>If i try with the below, </p><p>..... </p><p>MBeanServer server = MBeanServerLocator.locateJBoss(); </p><p>..... </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm getting this error. </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>[java] java.lang.IllegalStateException: No 'jboss' MBeanServer found! </p><p>[java] at org.jboss.mx.util.MBeanServerLocator.locateJBoss(MBeanServerLocator.java:110) </p><p>[java] at org.apache.jsp.demo_jsp._jspService(demo_jsp.java:67) </p><p>[java] at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) </p><p>[java] at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) </p><p>[java] at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369) </p><p>[java] at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:322) </p><p>[java] at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249) </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>If i use the below: </p><p>... </p><p>MBeanServer server = MBeanServerLocator.locate(); </p><p>... </p><p>  </p><p>then getting this error. </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>[java] java.util.NoSuchElementException </p><p>[java] at java.util.AbstractList$Itr.next(AbstractList.java:350) </p><p>[java] at org.jboss.mx.util.MBeanServerLocator.locate(MBeanServerLocator.java:67) </p><p>[java] at org.jboss.mx.util.MBeanServerLocator.locate(MBeanServerLocator.java:80) </p><p>[java] at org.apache.jsp.demo1_jsp._jspService(demo1_jsp.java:67) </p><p>[java] at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) </p><p>[java] at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) </p><p>[java] at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369) </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Also tried this option, but not able to get reference to the mbean server. </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p> ....  </p><p>ArrayList serverList = MBeanServerFactory.findMBeanServer (null);  </p><p>log ("servers.size() = " + serverList.size());  </p><p>.....  </p><p>  </p><p>Output: </p><p>servers.size() = 0 </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Can you please explain the reason for this error or what is the correct way to obtain reference of Jboss mbean server in application code running on the same VM.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Dropped the below JSP file in to jmx-console.war of jboss</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p> <%@page import="javax.management.MBeanServer"%></p><p><%@page import="org.jboss.mx.util.MBeanServerLocator"%></p><p><%@page import="javax.management.MBeanServerFactory"%></p><p><%@page import="java.util.ArrayList"%></p><p><html></p><p><body></p><p><%</p><p>MBeanServer server1 = MBeanServerLocator.locate();</p><p>MBeanServer server2 = MBeanServerLocator.locateJBoss();</p><p>ArrayList ser = MBeanServerFactory.findMBeanServer(null);</p><p>  %></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Locate method          : <%=server1%>   </br></p><p>Locate Jboss method    : <%=server2%>   </br></p><p>findMBeanServer method : <%=ser%>   </br></p><p>  </p><p></body></p><p></html></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm able to see the below output:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p> Locate method : org.jboss.mx.server.MBeanServerImpl@121dcac[ defaultDomain='jboss' ] </p><p>Locate Jboss method : org.jboss.mx.server.MBeanServerImpl@121dcac[ defaultDomain='jboss' ] </p><p>findMBeanServer method : [org.jboss.mx.server.MBeanServerImpl@121dcac[ defaultDomain='jboss' ], org.jboss.mx.server.MBeanServerImpl@dc5c8b[ defaultDomain='null' ]] </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>However if i drop the same JSP in to my application WAR and access it. I'm getting this exception as stated in my above post.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm running out of clues. Any help will be highly appreciated.</p></div>
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