Created attachment 585383 [details]
No Tomcat Connectors in JON 310

Description of problem:
Installed EWS 1.0.2 and started tomcat 5. When using clean installation of JON 3.1.0 (installation zip file is downloaded from http://download.devel.redhat.com/brewroot/packages/org.jboss.on-jboss-on-parent/3.1.0.GA/6/maven/org/jboss/on/jon-server/3.1.0.GA/jon-server-3.1.0.GA.zip), this server is properly discovered and added into inventory. However it's connectors are not discovered at all. 

I repeated the same with JON 3.0 and Tomcat 5 Connectors were properly discovered.

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

JON 3.1.0

How reproducible:
Always

Steps to Reproduce:
1. Clean install of JON 3.1.0 and JON Agent 3.1.0
2. Install and configure EWS 1.0.2
3. Run Tomcat 5 (using default server.xml file)
  
Actual results:
No Tomcat Connectors are discovered.

Expected results:
Tomcat Connectors are properly discovered.


Additional info: 

The following exception is logged in the agent.log file:
*******************************************************
2012-05-18 11:35:37,008 DEBUG [InventoryManager.discovery-1] (rhq.core.pc.inventory.RuntimeDiscoveryExecutor)- Running service scan on parent resource [Resource[id=10005, uuid=636def92-b6e3-4175-90c0-1c923c234f25, type={Tomcat}Tomcat Server, key=/home/biljana/EWS/jboss-ews-1.0/tomcat5, name=Tomcat (8080), parent=10.33.1.120, version=5.5.33.0]] looking for children of type [{Tomcat}Tomcat Connector]
2012-05-18 11:35:37,008 DEBUG [InventoryManager.discovery-1] (rhq.core.pc.inventory.InventoryManager)- Executing discovery for [Tomcat Connector] Resources...
2012-05-18 11:35:37,022 DEBUG [InventoryManager.discovery-1] (rhq.core.pc.util.DiscoveryComponentProxyFactory)- Call to [org.jboss.on.plugins.tomcat.TomcatConnectorDiscoveryComponent.discoverResources()] with args [[org.rhq.core.pluginapi.inventory.ResourceDiscoveryContext@4e0b495e]] failed.
java.util.concurrent.ExecutionException: java.lang.Exception: Discovery component invocation failed.
	at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:232)
	at java.util.concurrent.FutureTask.get(FutureTask.java:91)
	at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ResourceDiscoveryComponentInvocationHandler.invokeInNewThread(DiscoveryComponentProxyFactory.java:221)
	at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ResourceDiscoveryComponentInvocationHandler.invoke(DiscoveryComponentProxyFactory.java:208)
	at $Proxy50.discoverResources(Unknown Source)
	at org.rhq.core.pc.inventory.InventoryManager.invokeDiscoveryComponent(InventoryManager.java:324)
	at org.rhq.core.pc.inventory.InventoryManager.executeComponentDiscovery(InventoryManager.java:2433)
	at org.rhq.core.pc.inventory.RuntimeDiscoveryExecutor.discoverForResource(RuntimeDiscoveryExecutor.java:260)
	at org.rhq.core.pc.inventory.RuntimeDiscoveryExecutor.discoverForResourceRecursive(RuntimeDiscoveryExecutor.java:156)
	at org.rhq.core.pc.inventory.RuntimeDiscoveryExecutor.runtimeDiscover(RuntimeDiscoveryExecutor.java:141)
	at org.rhq.core.pc.inventory.RuntimeDiscoveryExecutor.call(RuntimeDiscoveryExecutor.java:100)
	at org.rhq.core.pc.inventory.RuntimeDiscoveryExecutor.call(RuntimeDiscoveryExecutor.java:56)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:207)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.Exception: Discovery component invocation failed.
	at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ComponentInvocationThread.call(DiscoveryComponentProxyFactory.java:297)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	... 3 more
Caused by: java.lang.NullPointerException
	at org.jboss.on.plugins.tomcat.TomcatConnectorDiscoveryComponent.discoverResources(TomcatConnectorDiscoveryComponent.java:126)
	at sun.reflect.GeneratedMethodAccessor38.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ComponentInvocationThread.call(DiscoveryComponentProxyFactory.java:293)
	... 5 more
2012-05-18 11:35:37,027 WARN  [InventoryManager.discovery-1] (rhq.core.pc.inventory.InventoryManager)- Failure during discovery for [Tomcat Connector] Resources - failed after 19 ms.
java.lang.Exception: Discovery component invocation failed.
	at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ComponentInvocationThread.call(DiscoveryComponentProxyFactory.java:297)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
	at org.jboss.on.plugins.tomcat.TomcatConnectorDiscoveryComponent.discoverResources(TomcatConnectorDiscoveryComponent.java:126)
	at sun.reflect.GeneratedMethodAccessor38.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ComponentInvocationThread.call(DiscoveryComponentProxyFactory.java:293)
	... 5 more