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https://issues.apache.org/jira/browse/YARN-7146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16222630#comment-16222630
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Daniel Templeton commented on YARN-7146:
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+1 pending something conclusive from Jenkins.
> Many RM unit tests failing with FairScheduler
> ---------------------------------------------
>
> Key: YARN-7146
> URL: https://issues.apache.org/jira/browse/YARN-7146
> Project: Hadoop YARN
> Issue Type: Bug
> Components: test
> Affects Versions: 3.0.0-beta1
> Reporter: Robert Kanter
> Assignee: Robert Kanter
> Fix For: 3.0.0-beta1, 3.1.0
>
> Attachments: YARN-7146.001.patch, YARN-7146.002.patch,
> YARN-7146.003.patch, YARN-7146.004.branch-2.patch, YARN-7146.004.patch
>
>
> Many of the RM unit tests are failing when using the FairScheduler.
> Here is a list of affected test classes:
> {noformat}
> TestYarnClient
> TestApplicationCleanup
> TestApplicationMasterLauncher
> TestDecommissioningNodesWatcher
> TestKillApplicationWithRMHA
> TestNodeBlacklistingOnAMFailures
> TestRM
> TestRMAdminService
> TestRMRestart
> TestResourceTrackerService
> TestWorkPreservingRMRestart
> TestAMRMRPCNodeUpdates
> TestAMRMRPCResponseId
> TestAMRestart
> TestApplicationLifetimeMonitor
> TestNodesListManager
> TestRMContainerImpl
> TestAbstractYarnScheduler
> TestSchedulerUtils
> TestFairOrderingPolicy
> TestAMRMTokens
> TestDelegationTokenRenewer
> {noformat}
> Most of the test methods in these classes are failing, though some do succeed.
> There's two main categories of issues:
> # The test submits an application to the {{MockRM}} and waits for it to enter
> a specific state, which it never does, and the test times out. We need to
> call {{update()}} on the scheduler.
> # The test throws a {{ClassCastException}} on {{FSQueueMetrics}} to
> {{CSQueueMetrics}}. This is because {{QueueMetrics}} metrics are static, and
> a previous test using FairScheduler initialized it, and the current test is
> using CapacityScheduler. We need to reset the metrics.
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