[jira] [Commented] (SPARK-3090) Avoid not stopping SparkContext with YARN Client mode

["Marcelo Vanzin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-3090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14107488#comment-14107488 ] 

Marcelo Vanzin commented on SPARK-3090:
---------------------------------------

I think that if we want to add this, it would be better to do so for all modes, not just yarn-client. Basically have SparkContext itself register a shutdown hook to shut itself down, and publish the priority of the hook so that apps / backends can register hooks that run before it (see Hadoop's ShutdownHookManager for the priority thing - http://goo.gl/BQ1bjk).

That way the code in the yarn-cluster backend can be removed too.

>  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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