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https://issues.apache.org/jira/browse/SPARK-23781?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16637582#comment-16637582
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Apache Spark commented on SPARK-23781:
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User 'vanzin' has created a pull request for this issue:
https://github.com/apache/spark/pull/22624

> Merge YARN and Mesos token renewal code
> ---------------------------------------
>
>                 Key: SPARK-23781
>                 URL: https://issues.apache.org/jira/browse/SPARK-23781
>             Project: Spark
>          Issue Type: Improvement
>          Components: Mesos, YARN
>    Affects Versions: 2.4.0
>            Reporter: Marcelo Vanzin
>            Priority: Major
>
> With the fix for SPARK-23361, the code that handles delegation tokens in 
> Mesos and YARN ends up being very similar.
> We should refactor that code so that both backends are sharing the same code, 
> which also would make it easier for other cluster managers to use that code.



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