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https://issues.apache.org/jira/browse/SPARK-3090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14117036#comment-14117036
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Kousuke Saruta commented on SPARK-3090:
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It sound good idea that SparkContext register shutdown-hook itself.
> Avoid not stopping SparkContext with YARN Client mode
> ------------------------------------------------------
>
> Key: SPARK-3090
> URL: https://issues.apache.org/jira/browse/SPARK-3090
> Project: Spark
> Issue Type: Bug
> Components: Spark Core, YARN
> Affects Versions: 1.1.0
> Reporter: Kousuke Saruta
>
> When we use YARN Cluster mode, ApplicationMaser register a shutdown hook,
> stopping SparkContext.
> Thanks to this, SparkContext can stop even if Application forgets to stop
> SparkContext itself.
> But, unfortunately, YARN Client mode doesn't have such mechanism.
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