[YARN-11642] Fix Flaky Test TestTimelineAuthFilterForV2#testPutTimelineEntities

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.5.0
• Fix Version/s: 3.4.0, 3.5.0
• Component/s: timelineservice
• Labels: pull-request-available
• Target Version/s: 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Shilun Fan
• Reporter: Shilun Fan
• Created: 06/Jan/24 03:55
• Updated: 25/Jan/24 15:19
• Resolved: 06/Jan/24 08:27

Description

Our current unit tests are all executed in parallel.
TestTimelineAuthFilterForV2#testPutTimelineEntities will report an error during execution:

[main] collector.PerNodeTimelineCollectorsAuxService (StringUtils.java:startupShutdownMessage(755)) - failed to register any UNIX signal loggers: 
java.lang.IllegalStateException: Can't re-install the signal handlers.

We can solve this problem by changing static initialization to new Object.

Issue Links

• links to: GitHub Pull Request #6417