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https://issues.apache.org/jira/browse/YARN-9800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16918485#comment-16918485
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Adam Antal commented on YARN-9800:
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After I've searched around the jiras, the problem looks quite similar to
another test in that class: testRMDTMasterKeyStateOnRollingMasterKey (see
YARN-8904). In YARN-8904 the problem was the same and it was mitigated by
checking not the exact match but only a contains relation between the list of
master keys.
Since in this test we wait for the expiry of the keys, and in the check part of
the test we only check for exclusion of those keys (and again, not the exact
match), we can provide the same solution here. I pull in the guys reviewed/had
part in that jira whether they agree with this or not.
> TestRMDelegationTokens can fail in testRemoveExpiredMasterKeyInRMStateStore
> ---------------------------------------------------------------------------
>
> Key: YARN-9800
> URL: https://issues.apache.org/jira/browse/YARN-9800
> Project: Hadoop YARN
> Issue Type: Bug
> Components: test, yarn
> Affects Versions: 3.2.0
> Reporter: Adam Antal
> Assignee: Adam Antal
> Priority: Major
>
> The test fails intermittently with the following stack trace:
> {noformat}
> java.lang.AssertionError:
> expected:<[org.apache.hadoop.security.token.delegation.DelegationKey@c09cd1a8,
> org.apache.hadoop.security.token.delegation.DelegationKey@ca089752]> but
> was:<[org.apache.hadoop.security.token.delegation.DelegationKey@c09cd1a8,
> org.apache.hadoop.security.token.delegation.DelegationKey@b206142c,
> org.apache.hadoop.security.token.delegation.DelegationKey@ca089752]>
> at
> org.apache.hadoop.yarn.server.resourcemanager.security.TestRMDelegationTokens.testRemoveExpiredMasterKeyInRMStateStore(TestRMDelegationTokens.java:161)
> {noformat}
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