Fuse or ActiveMQ resource discovery reports "Failed to extract JMX service URL for process with PID [...]" due to failure in getProcCredName

Issue

• Agent is not detecting or discovering ActiveMQ

• agent.log contains discovery warning:

  WARN  [ResourceDiscoveryComponent.invoker.daemon-2] (org.jbosson.plugins.fuse.JBossFuseContainerDiscoveryComponent)- Error when trying to discover Fuse Server process [ProcessScanResult: scan=[ProcessScan: query=[process|basename|match=^java.*,arg|-Dkaraf.home|match=.*,arg|-Dkaraf.base|match=.*,arg|*|match=org\.apache\.karaf\.(main|shell\.wrapper)\.Main], name=[null]], info=[process: pid=[1234], name=[java], ppid=[123]]] (enable DEBUG for stack trace): java.lang.RuntimeException: Failed to extract JMX service URL for process with PID [1234].
  

• Agent's debug log shows following discovery failure:

  java.lang.RuntimeException: Failed to extract JMX service URL for process with PID [1234].
      at org.rhq.plugins.jmx.util.JvmUtility.extractJMXServiceURL(JvmUtility.java:100)
  Caused by: java.lang.NullPointerException
      at org.rhq.plugins.jmx.util.JvmUtility.attachToVirtualMachine(JvmUtility.java:117)
  

• Unable to discover JBoss Fuse Container, ActiveMQ Server, Fabric Container, or Servicemix4