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https://issues.apache.org/jira/browse/YARN-5362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15374162#comment-15374162
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sandflee commented on YARN-5362:
--------------------------------
update a patch to add drainEvents() before asserts, there had a very little
race condition since drainEvents() just grant there are no event in event
queue, not grant event are processed completely.
> TestRMRestart#testFinishedAppRemovalAfterRMRestart can fail
> -----------------------------------------------------------
>
> Key: YARN-5362
> URL: https://issues.apache.org/jira/browse/YARN-5362
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Jason Lowe
> Assignee: sandflee
> Attachments: YARN-5362.01.patch
>
>
> Saw the following in a precommit build that only changed an unrelated unit
> test:
> {noformat}
> Tests run: 29, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 101.265 sec
> <<< FAILURE! - in org.apache.hadoop.yarn.server.resourcemanager.TestRMRestart
> testFinishedAppRemovalAfterRMRestart(org.apache.hadoop.yarn.server.resourcemanager.TestRMRestart)
> Time elapsed: 0.411 sec <<< FAILURE!
> java.lang.AssertionError: expected null, but
> was:<org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl@70ebeeba>
> at org.junit.Assert.fail(Assert.java:88)
> at org.junit.Assert.failNotNull(Assert.java:664)
> at org.junit.Assert.assertNull(Assert.java:646)
> at org.junit.Assert.assertNull(Assert.java:656)
> at
> org.apache.hadoop.yarn.server.resourcemanager.TestRMRestart.testFinishedAppRemovalAfterRMRestart(TestRMRestart.java:1653)
> {noformat}
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