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https://issues.apache.org/jira/browse/YARN-5362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15373958#comment-15373958
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sandflee commented on YARN-5362:
--------------------------------
seen many test failures related to RMApp/RMAppattempt comes to some state but
some event are not processed in rm event queue or scheduler event queue, cause
test failure, seems we could implicitly invokes drainEvents(should also drain
sheduler event) in some mockRM method like waitForState, thought? cc [~sunilg]
[~rohithsharma]
{code}
void waitForState() {
....
drainEvents();
}
{code}
> 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
>
> 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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