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https://issues.apache.org/jira/browse/SPARK-51450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jayadeep Jayaraman updated SPARK-51450:
---------------------------------------
    Description: When `xgboost` or any framework that relies on `Barrier` stage 
runs in a standalone mode does not exit when the JVM shuts down. This is 
because the `timer` class is not cancelled when `onStop` method is invoked.

> BarrierCoordinator thread not exiting in Spark standalone mode
> --------------------------------------------------------------
>
>                 Key: SPARK-51450
>                 URL: https://issues.apache.org/jira/browse/SPARK-51450
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 3.5.3, 3.5.5
>            Reporter: Jayadeep Jayaraman
>            Priority: Major
>             Fix For: 3.5.5
>
>
> When `xgboost` or any framework that relies on `Barrier` stage runs in a 
> standalone mode does not exit when the JVM shuts down. This is because the 
> `timer` class is not cancelled when `onStop` method is invoked.



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