Hi

For one the monitored JBoss servers, Im not able to monitor any of its child resources (cache, tomcat, ejb's etc). Agent logs reveal exception shown below (there are multiple of them in logs, one per child resource)
I have one more Jboss on same platform, its monitored fine.

Any ideas?

Regards
Alexey


2010-07-22 07:58:09,291 ERROR [InventoryManager.discovery-1] (rhq.core.pc.inventory.InventoryManager)- Failed to start component for Resource[id=135529, type=JBossCacheSubsystem, key=J
Boss Cache subsystem, name=JBoss Cache subsystem, parent=192.168.1.93:21099, version=1.0] from synchronized merge.                                                                      
org.rhq.core.clientapi.agent.PluginContainerException: Failed to start component for resource Resource[id=135529, type=JBossCacheSubsystem, key=JBoss Cache subsystem, name=JBoss Cache
subsystem, parent=192.168.1.93:21099, version=1.0].                                                                                                                                     
        at org.rhq.core.pc.inventory.InventoryManager.activateResource(InventoryManager.java:1387)                                                                                      
        at org.rhq.core.pc.inventory.InventoryManager.refreshResourceComponentState(InventoryManager.java:2404)                                                                         
        at org.rhq.core.pc.inventory.InventoryManager.processSyncInfo(InventoryManager.java:2187)                                                                                       
        at org.rhq.core.pc.inventory.InventoryManager.processSyncInfo(InventoryManager.java:2193)                                                                                       
        at org.rhq.core.pc.inventory.InventoryManager.processSyncInfo(InventoryManager.java:2193)                                                                                       
        at org.rhq.core.pc.inventory.InventoryManager.synchInventory(InventoryManager.java:911)                                                                                         
        at org.rhq.core.pc.inventory.InventoryManager.handleReport(InventoryManager.java:891)                                                                                           
        at org.rhq.core.pc.inventory.AutoDiscoveryExecutor.call(AutoDiscoveryExecutor.java:121)                                                                                         
        at org.rhq.core.pc.inventory.AutoDiscoveryExecutor.run(AutoDiscoveryExecutor.java:92)                                                                                           
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)                                                                                                      
        at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)                                                                                                   
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)                                                                                                             
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)                                                         
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)                                                       
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)                                                               
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)                                                                                          
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)                                                                                              
        at java.lang.Thread.run(Thread.java:619)                                                                                                                                        
Caused by: java.lang.IllegalStateException: No plugin class loader was specified for org.rhq.core.pc.inventory.ResourceContainer$ComponentInvocationThread@848170f.                     
        at org.rhq.core.pc.inventory.ResourceContainer$ComponentInvocationThread.call(ResourceContainer.java:521)                                                                       
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)                                                                                                           
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)                                                                                                                     
        ... 3 more