[jboss-jira] [JBoss JIRA] (WFCORE-2656) DeploymentTestCase.testFilesystemScannerRegistration fails intermittently

[ https://issues.jboss.org/browse/WFCORE-2656?page=com.atlassian.jira.plugi... ] Brian Stansberry commented on WFCORE-2656: ------------------------------------------ I think that WFLYDS0012 is relevant and highlights a flaw in the CapabilityRegistry. I think what we have is two threads, writer thread WT and reader thread RT. WT is doing the deployment-scanner=dummy:remove. RT is the scan thread trying to read deployment status. 1) WT modifies the CapabiltyRegistry, so now it's state differs from that of its publishedFullRegistry member. 2) RT is cancelled due to the remove happening, so its OperationContext enters enterResultHandlerPhase and calls OperationContextImpl.operationRollingBack / ModelControllerImp.disardModel / ManagemtModelImpl.discard / CapabilityRegistry.rollback. 3) CapabilityRegistry.rollback restores the state from the publishedFullRegistry, effectively undoing what WT did in step 1) 4) WT gets to OperationContext executeDoneStage and publishes the capability registry, which means its incorrect state from 3) is pushed to publishedFullRegistry. This is going to take some thought. RT hasn't modified anything so it shouldn't do anything in rollback. -- This message was sent by Atlassian JIRA (v7.2.3#72005)