Bug 821854

Summary:	[plugin-container] hundreds of "Access to resource [Resource[id=xxxxx]...] will fail due to missing classloader!" errors written to agent log during resource upgrade at PC startup
Product:	[Other] RHQ Project	Reporter:	Ian Springer <ian.springer>
Component:	Plugin Container	Assignee:	RHQ Project Maintainer <rhq-maint>
Status:	CLOSED NOTABUG	QA Contact:	Mike Foley <mfoley>
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	4.4	CC:	ccrouch, hrupp
Target Milestone:	---
Target Release:	JON 3.1.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:	RHQ master, 2 EAP6 ER6 domain controllers running
Last Closed:	2012-05-15 16:18:18 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	707223

Description Ian Springer 2012-05-15 15:15:45 UTC

I see hundreds of the below errors in my Agent log during Agent startup (519 to be exact). All of them have the same stack trace. Note, they occur during the sync that is initiated by InventoryManager.activateAndUpgradeResources(). *** All 519 of the errors are for JBossAS7 Resources ***  This must be a clue as to what the underlying cause is. Perhaps it's something specific to Resources with runs-inside types, of which the as7 plugin has many.

---

2012-05-15 11:02:21,209 ERROR [main] (rhq.core.pc.inventory.InventoryManager)- Access to resource [Resource[id=12102, uuid=03f42cda-00c5-40ea-9d58-2414a9932468, type={JBossAS7}Connection Factory, key=profile=full,subsystem=messaging,hornetq-server=default,connection-factory=RemoteConnectionFactory, name=RemoteConnectionFactory, parent=default]] will fail due to missing classloader!
org.rhq.core.clientapi.agent.PluginContainerException: Failed to obtain classloader for resource: Resource[id=12102, uuid=03f42cda-00c5-40ea-9d58-2414a9932468, type={JBossAS7}Connection Factory, key=profile=full,subsystem=messaging,hornetq-server=default,connection-factory=RemoteConnectionFactory, name=RemoteConnectionFactory, parent=default]
	at org.rhq.core.pc.plugin.PluginComponentFactory.getResourceClassloader(PluginComponentFactory.java:213)
	at org.rhq.core.pc.inventory.InventoryManager.initResourceContainer(InventoryManager.java:1493)
	at org.rhq.core.pc.inventory.InventoryManager.processSyncInfo(InventoryManager.java:2626)
	at org.rhq.core.pc.inventory.InventoryManager.processSyncInfo(InventoryManager.java:2667)
	at org.rhq.core.pc.inventory.InventoryManager.processSyncInfo(InventoryManager.java:2667)
	at org.rhq.core.pc.inventory.InventoryManager.processSyncInfo(InventoryManager.java:2667)
	at org.rhq.core.pc.inventory.InventoryManager.processSyncInfo(InventoryManager.java:2667)
	at org.rhq.core.pc.inventory.InventoryManager.processSyncInfo(InventoryManager.java:2667)
	at org.rhq.core.pc.inventory.InventoryManager.synchInventory(InventoryManager.java:1085)
	at org.rhq.core.pc.inventory.InventoryManager.handleReport(InventoryManager.java:1059)
	at org.rhq.core.pc.inventory.InventoryManager.activateAndUpgradeResources(InventoryManager.java:2934)
	at org.rhq.core.pc.inventory.InventoryManager.initialize(InventoryManager.java:235)
	at org.rhq.core.pc.PluginContainer.startContainerService(PluginContainer.java:488)
	at org.rhq.core.pc.PluginContainer.initialize(PluginContainer.java:308)
	at org.rhq.enterprise.agent.AgentMain.startPluginContainer(AgentMain.java:1925)
	at org.rhq.enterprise.agent.AgentMain.start(AgentMain.java:659)
	at org.rhq.enterprise.agent.AgentMain.main(AgentMain.java:428)
Caused by: org.rhq.core.clientapi.agent.PluginContainerException: [Warning] Cannot load class [org.rhq.modules.plugins.jbossas7.SubsystemDiscovery] with null classloader
	at org.rhq.core.clientapi.agent.PluginContainerException.wrapIfNecessary(PluginContainerException.java:69)
	at org.rhq.core.clientapi.agent.PluginContainerException.<init>(PluginContainerException.java:96)
	... 17 more

Comment 1 Ian Springer 2012-05-15 16:18:18 UTC

After doing a full mvn clean install and restarting both my Server and my Agent, these errors no longer occurred. I'm closing it as NOTABUG. I'll reopen if I see it again with a freshly built environment.