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https://issues.apache.org/jira/browse/YARN-11642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17803741#comment-17803741
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ASF GitHub Bot commented on YARN-11642:
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slfan1989 opened a new pull request, #6417:
URL: https://github.com/apache/hadoop/pull/6417
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### Description of PR
JIRA: Fix Flaky Test TestTimelineAuthFilterForV2#testPutTimelineEntities.
### How was this patch tested?
### For code changes:
- [ ] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
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> Fix Flaky Test TestTimelineAuthFilterForV2#testPutTimelineEntities
> ------------------------------------------------------------------
>
> Key: YARN-11642
> URL: https://issues.apache.org/jira/browse/YARN-11642
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: timelineservice
> Affects Versions: 3.5.0
> Reporter: Shilun Fan
> Assignee: Shilun Fan
> Priority: Major
>
> Our current unit tests are all executed in parallel.
> TestTimelineAuthFilterForV2#testPutTimelineEntities will report an error
> during execution:
> {code:java}
> [main] collector.PerNodeTimelineCollectorsAuxService
> (StringUtils.java:startupShutdownMessage(755)) - failed to register any UNIX
> signal loggers:
> java.lang.IllegalStateException: Can't re-install the signal handlers.
> {code}
> We can solve this problem by changing static initialization to new Object.
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