Discovery of JBoss instance fails with NullPointerException when JBoss ON agent and JBoss instance have been started by different users

Issue

• Agent's auto discovery process is failing to discover JBoss AS instance

• The following error is displayed in agent's log:

  ERROR [ResourceDiscoveryComponent.invoker.daemon-2] (org.rhq.plugins.jbossas.JBossASDiscoveryComponent)- Failed to process JBoss AS command line: [...]
  java.lang.NullPointerException
          at org.rhq.core.system.ProcessInfo.getCurrentWorkingDirectory(ProcessInfo.java:373)
          at org.rhq.plugins.jbossas.helper.JBossInstanceInfo.<init>(JBossInstanceInfo.java:86)
          at org.rhq.plugins.jbossas.JBossASDiscoveryComponent.processAutoDiscoveredProcesses(JBossASDiscoveryComponent.java:101)
          at org.rhq.plugins.jbossas.JBossASDiscoveryComponent.discoverResources(JBossASDiscoveryComponent.java:86)
          at sun.reflect.GeneratedMethodAccessor36.invoke(Unknown Source)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
          at java.lang.reflect.Method.invoke(Unknown Source)
          at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ComponentInvocationThread.call(DiscoveryComponentProxyFactory.java:266)
          at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
          at java.util.concurrent.FutureTask.run(Unknown Source)
          at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
          at java.lang.Thread.run(Unknown Source)</code>