JBoss ON agent fails to collect response time (calltime) metrics from EAP 6 web application resource and throws UnsupportedOperationException

Issue

• Does not show calltime metrics for web applications
• Response time metrics do not appear

• The agent log file contains messages like:

  WARN  [MeasurementManager.collector-1] (rhq.core.pc.measurement.MeasurementCollectorRunner)- Failure to collect measurement data for Resource[id=10100, uuid=b4fc3c8f-416f-3b02-a39e-ae17c8aede35, type={JBossAS7}Web Runtime, key=deployment=my-web-app.war,subsystem=web, name=web, parent=my-web-app.war] - cause: java.lang.UnsupportedOperationException:null
  

• Calltime metrics are not collected for web application

• Agent log contains the following warning:

  WARN  [MeasurementManager.collector-1] (rhq.core.pc.measurement.MeasurementCollectorRunner)- Failure to collect measurement data for Resource[id=10122, uuid=df343d2f-6280-4ee3-ac73-468a100d7898, type={JBossAS7}Web Runtime, key=deployment=jboss-as-helloworld.war,subsystem=web, name=web, parent=jboss-as-helloworld.war], requests=[ScheduledMeasurementInfo[res=10122, name=responseTime, sched=10694]], report.size()=0
  java.lang.UnsupportedOperationException
      at java.util.Collections$UnmodifiableCollection$1.remove(Collections.java:1028)
      at org.rhq.modules.plugins.jbossas7.WebRuntimeComponent.getValues(WebRuntimeComponent.java:84)
      at sun.reflect.GeneratedMethodAccessor57.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:616)
      at org.rhq.core.pc.inventory.ResourceContainer$ComponentInvocationThread.call(ResourceContainer.java:634)
      at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
      at java.util.concurrent.FutureTask.run(FutureTask.java:166)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
      at java.lang.Thread.run(Thread.java:636)
  

• Response Time logged locally only