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https://issues.apache.org/jira/browse/YARN-11876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18028319#comment-18028319
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ASF GitHub Bot commented on YARN-11876:
---------------------------------------

hadoop-yetus commented on PR #8014:
URL: https://github.com/apache/hadoop/pull/8014#issuecomment-3380806736

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
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   |||| _ Other Tests _ |
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   | +1 :green_heart: |  asflicense  |   0m 38s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   | 262m 20s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.51 ServerAPI=1.51 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/6/artifact/out/Dockerfile
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   | GITHUB PR | https://github.com/apache/hadoop/pull/8014 |
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https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/6/testReport/ |
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   | modules | C: 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
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   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/6/console |
   | versions | git=2.25.1 maven=3.9.11 spotbugs=4.2.2 |
   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
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> Fix AsyncDispatcher crash in TestAppManager
> -------------------------------------------
>
>                 Key: YARN-11876
>                 URL: https://issues.apache.org/jira/browse/YARN-11876
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager
>    Affects Versions: 3.5.0
>            Reporter: Shilun Fan
>            Assignee: Shilun Fan
>            Priority: Major
>
> h3. *Description*
> After upgrading to {*}JUnit 5{*}, the {{ResourceManager}} module encounters a 
> crash when running unit tests. Specifically, the failure occurs in the test 
> case {{{}TestAppManager#testRMAppSubmitWithQueueChanged{}}}.
> During application submission, the test changes the queue assignment, which 
> triggers a {{SchedulerEvent}} that the {{AsyncDispatcher}} cannot handle.
> As a result, the dispatcher thread throws an exception and terminates, 
> causing the test JVM to exit abnormally with a 
> {{{}SurefireBooterForkException{}}}.
> *Error Details*
> {code:java}
> 2025-10-08 07:56:46,833 ERROR [AsyncDispatcher event handler] 
> event.AsyncDispatcher (MarkerIgnoringBase.java:error(159)) - Error in 
> dispatcher thread
> java.lang.Exception: No handler registered for class 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.event.SchedulerEventType
>     at 
> org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:277)
>     at 
> org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:162)
>     at java.lang.Thread.run(Thread.java:750) {code}
> This leads to Maven Surefire reporting a forked VM crash:
> {code:java}
> org.apache.maven.surefire.booter.SurefireBooterForkException: 
> ExecutionException The forked VM terminated without properly saying goodbye. 
> VM crash or System.exit called?
> Process Exit Code: 255
> Crashed tests: org.apache.hadoop.yarn.server.resourcemanager.TestAppManager 
> {code}



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