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https://issues.apache.org/jira/browse/YARN-1830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13934535#comment-13934535
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Zhijie Shen commented on YARN-1830:
-----------------------------------
If I understand correctly, the race condition happens here:
{code}
int timeoutSecs = 0;
while (loadedApp1.getAppAttempts().size() != 2 && timeoutSecs++ < 40) {;
Thread.sleep(200);
}
assertQueueMetrics(qm2, 1, 1, 0, 0);
{code}
When the second attempt is created via recovery, the submitted app count will
stay at 0 until RECOVER event is processed. If assertQueueMetrics is executed
before it, the failure will occur.
> TestRMRestart.testQueueMetricsOnRMRestart failure
> -------------------------------------------------
>
> Key: YARN-1830
> URL: https://issues.apache.org/jira/browse/YARN-1830
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.4.0
> Reporter: Karthik Kambatla
>
> TestRMRestart.testQueueMetricsOnRMRestart fails intermittently as follows
> (reported on YARN-1815):
> {noformat}
> java.lang.AssertionError: expected:<37> but was:<38>
> ...
> at
> org.apache.hadoop.yarn.server.resourcemanager.TestRMRestart.assertQueueMetrics(TestRMRestart.java:1728)
> at
> org.apache.hadoop.yarn.server.resourcemanager.TestRMRestart.testQueueMetricsOnRMRestart(TestRMRestart.java:1682)
> {noformat}
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