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https://issues.apache.org/jira/browse/YARN-9461?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16908154#comment-16908154
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Szilard Nemeth commented on YARN-9461:
--------------------------------------
Kicked off build again, in order to have a fresh Jenkins result.
> TestRMWebServicesDelegationTokenAuthentication.testCancelledDelegationToken
> fails with HTTP 400
> -----------------------------------------------------------------------------------------------
>
> Key: YARN-9461
> URL: https://issues.apache.org/jira/browse/YARN-9461
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager, test
> Reporter: Peter Bacsko
> Assignee: Peter Bacsko
> Priority: Minor
> Attachments: YARN-9461-001.patch
>
>
> The test
> {{TestRMWebServicesDelegationTokenAuthentication.testCancelledDelegationToken}}
> sometimes fails with the following error:
> {noformat}
> java.io.IOException: Server returned HTTP response code: 400 for URL:
> http://localhost:8088/ws/v1/cluster/delegation-token
> at
> org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesDelegationTokenAuthentication.cancelDelegationToken(TestRMWebServicesDelegationTokenAuthentication.java:462)
> at
> org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesDelegationTokenAuthentication.testCancelledDelegationToken(TestRMWebServicesDelegationTokenAuthentication.java:283)
> {noformat}
> The problem is that for whatever reason, Jetty seems to execute the token
> cancellation REST call twice. First we get HTTP 200 OK, but the second
> request fails with HTTP 400 Bad Request.
> The {{MockRM}} instance is static. Something could be a problem in this class
> and it turned out that using separate {{MockRM}} instances solves the
> flakiness.
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