Bug 906041

Description of problem:
After enabling response time metrics for a web application deployed to EAP 6 no calltime data is made available under the WARs calltime monitoring page.

The response time log file contains valid data and the response time module appears to be functioning in the EAP 6 server. However, no data makes it to the RHQ server.

The agent log shows that the collection of calltime data fails with the following stack:

    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)


Version-Release number of selected component (if applicable):
4.4.0.JON312GA

How reproducible:
Always

Steps to Reproduce:
1.  Install `rhq-rtfilter-module.zip` into EAP `modules` directory:

        cd "${JBOSS_HOME}/modules"
        unzip "${TESTENV_DIR}/jon-server/jbossas/server/default/deploy/rhq.ear/rhq-downloads/connectors/rhq-rtfilter-module.zip"

2.  Add the `org.rhq.helpers.rhq-rtfilter` module to the `global-modules` section of the `urn:jboss:domain:ee:1.1` subsystem in `standalone.xml`:

        <profile...					
	        <subsystem xmlns="urn:jboss:domain:ee:1.1">	
		        <global-modules>
		            <module name="org.rhq.helpers.rhq-rtfilter" slot="main"/>
		        </global-modules>
	        </subsystem>
        </profile>

    The subsystem defintion should already exist and you should only need to add the global-modules definition.
    
3.  Install `rhq-rtfilter-subsystem-module.zip` into EAP `modules` directory:

        cd "${JBOSS_HOME}/modules"
        unzip "${TESTENV_DIR}/jon-server/jbossas/server/default/deploy/rhq.ear/rhq-downloads/connectors/rhq-rtfilter-subsystem-module.zip"

4.  Add the `org.rhq.helpers.rhq-rtfilter-subsystem` module to the  `extensions` element of standalone.xml:

        <extension module="org.rhq.helpers.rhq-rtfilter-subsystem"/>

5.  Add the `urn:rhq:rtfilter:1.0` subsystem to the `profile` element of standalone.xml:

        <subsystem xmlns="urn:rhq:rtfilter:1.0">
            <!-- Optional parameters. 
              
               <init-param>
                   <param-name>chopQueryString</param-name>
                   <param-value>true</param-value>
               </init-param>
               <init-param>
                   <param-name>logDirectory</param-name>
                  <param-value>/tmp</param-value>
               </init-param>
               <init-param>
                   <param-name>logFilePrefix</param-name>
                   <param-value>localhost_7080_</param-value>
               </init-param>
               <init-param>
                   <param-name>dontLogRegEx</param-name>
                   <param-value></param-value>
               </init-param>
               <init-param>
                  <param-name>matchOnUriOnly</param-name>
                  <param-value>true</param-value>
               </init-param>
               <init-param>
                   <param-name>timeBetweenFlushesInSec</param-name>
                   <param-value>73</param-value>
               </init-param>
               <init-param>
                   <param-name>flushAfterLines</param-name>
                   <param-value>13</param-value>
               </init-param>
               <init-param>
                   <param-name>maxLogFileSize</param-name>
                   <param-value>5242880</param-value>
               </init-param>       
        -->
        </subsystem>

6.  Start EAP 6 standalone server.
7.  Build and deploy `jboss-as-helloworld.war` from Quickstarts.

    Any WAR will do as long as it has been deployed and enabled in the EAP 6 server.
    
8.  Start JBoss ON system.
9.  Import EAP 6 standalone server into inventory.
10. Enable the response time metrics for the jboss-as-helloworld.war's web resource.
    
    1.  Navigate to the EAP 6 standalone resource's *Deployments / jboss-as-helloworld.war / web* resource's monitoring schedules page.
    2.  Set the *response time* *calltime* metric's collection interval to 1 minute.
    3.  Navigate to the EAP 6 standalone resource's *Deployments / jboss-as-helloworld.war / web* resource's inventory connection settings page.
    4.  Set *response time log file* to the complete path of the response time log file for the jboss-as-helloworld.war.
    
        This should be in `<JBOSS_HOME>/standalone/log/rt/jboss-as-helloworld_rt.log`.
11. Wait for a couple of minutes to be certain that the collection interval has elapsed.

  
Actual results:
No response time data is collected and the agent log contains the following warning each time the collection interval elapses (1 minute):
    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)

Expected results:
Response time data should appear on the jboss-as-helloworld.war's web resource's monitoring calltime page.

Additional info:
The root cause of the issue is that we are attempting to modify a UnmodifiableCollection in org.rhq.modules.plugins.jbossas7.WebRuntimeComponent.getValues.