Description of problem:
See the exception bellow. The cause of this issue should be clear. This exception was thrown to the agent log when all resources were imported (but relevant is probably only RHQ Server resource) and platform's operation 'Manual Autodiscovery' was invoked.

Version-Release number of selected component (if applicable):
Version :	
3.2.0.GA
Build Number :	
dcb8b6f:734bd56

How reproducible:
1/1

Steps to Reproduce:
1. Install jon32GA with all plugins (having all plugins installed is maybe not significant)
2. Import all resources
3. Run platform's operation 'Manual Autodiscovery'

Actual results:
Following exception is thrown to the agent log:

2013-12-13 02:16:45,556 WARN  [InventoryManager.discovery-1] (rhq.core.pc.inventory.InventoryManager)- Failure during discovery for [Query Cache] Resources - failed after 72 ms.
java.lang.Exception: Discovery component invocation failed.
	at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ComponentInvocationThread.call(DiscoveryComponentProxyFactory.java:309)
	at java.util.concurrent.FutureTask$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$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.IllegalArgumentException: Plugin error: Resource key [deployment=rhq.ear,subdeployment=rhq-core-domain-ejb3.jar,subsystem=jpa,hibernate-persistence-unit=rhq.ear/rhq-core-domain-ejb3.jar#rhqpu,query-cache=SELECT_space_COUNT_left_paren__star__right_paren__newline_FROM_space_AlertDefinition_space_alertdefinition_newline_WHERE_space__left_paren__space_alertdefinition.group.id_space_IN_space__left_paren__space__colon_resourceGroupIds_space__right_paren__space__newline_AND_space_alertdefinition.deleted_space__equal__space__colon_deleted_space__right_paren__newline_] specified by [ResourceType[id=0, name=Query Cache, plugin=JBossAS7, category=Service]] discovery component is longer than the maximum length (500).
	at org.rhq.core.pluginapi.inventory.DiscoveredResourceDetails.setResourceKey(DiscoveredResourceDetails.java:143)
	at org.rhq.core.pluginapi.inventory.DiscoveredResourceDetails.<init>(DiscoveredResourceDetails.java:95)
	at org.rhq.modules.plugins.jbossas7.SubsystemDiscovery.discoverResources(SubsystemDiscovery.java:158)
	at sun.reflect.GeneratedMethodAccessor29.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ComponentInvocationThread.call(DiscoveryComponentProxyFactory.java:305)
	... 5 more


Expected results:
No exceptions