title: Multiple [2] JMX MBeanServer instances exist
body: <p>May I know what is the common reasons for the following message shown in glassfish 3?</p>
  
  <pre><code>WARNING: Multiple [2] JMX MBeanServer instances exist, we will use the server at index [0] : [com.sun.enterprise.v3.admin.DynamicInterceptor@43c0ae76].
  WARNING: JMX MBeanServer in use: [com.sun.enterprise.v3.admin.DynamicInterceptor@43c0ae76] from index [0] 
  WARNING: JMX MBeanServer in use: [com.sun.jmx.mbeanserver.JmxMBeanServer@bbe5d86] from index [1]
  </code></pre>
  
  <p>I have just started 3 projects in netbean 7.2 as below</p>
  
  <ol>
  <li>common - currently only one singleton class for property file reading with @startup, @PostConstruct and @PreDestroy. it seems related to DynamicInterceptor in the warning above.</li>
  <li>web(include project 1 &amp; 3) - simple page with iceface enabled in netbean</li>
  <li>facade &amp; entity bean (include project 1)  - several entities + 1 generated facade from netbean, it seems use mbeanserver "JmxMBeanServer" in above warning.</li>
  </ol>
  
  <p>I have checked from google, most of them just ignore the warning above, any potential problem for the warning or why the above message is shown? Thanks.</p>