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https://issues.apache.org/jira/browse/YARN-5853?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15646643#comment-15646643
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Yussuf Shaikh commented on YARN-5853:
-------------------------------------
Fix would be to add a wait for the updatedToken to be generated before reading
the tokenBuffer.
> TestDelegationTokenRenewer#testRMRestartWithExpiredToken fails intermittently
> on Power
> --------------------------------------------------------------------------------------
>
> Key: YARN-5853
> URL: https://issues.apache.org/jira/browse/YARN-5853
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 3.0.0-alpha1
> Environment: # uname -a
> Linux pts00452-vm10 3.10.0-327.el7.ppc64le #1 SMP Thu Oct 29 17:31:13 EDT
> 2015 ppc64le ppc64le ppc64le GNU/Linux
> # cat /etc/redhat-release
> Red Hat Enterprise Linux Server release 7.2 (Maipo)
> Reporter: Yussuf Shaikh
>
> The test testRMRestartWithExpiredToken fails intermittently with the
> following error:
> Stacktrace:
> java.lang.AssertionError: null
> at org.junit.Assert.fail(Assert.java:86)
> at org.junit.Assert.assertTrue(Assert.java:41)
> at org.junit.Assert.assertNotNull(Assert.java:621)
> at org.junit.Assert.assertNotNull(Assert.java:631)
> at
> org.apache.hadoop.yarn.server.resourcemanager.security.TestDelegationTokenRenewer.testRMRestartWithExpiredToken(TestDelegationTokenRenewer.java:1060)
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