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https://issues.apache.org/jira/browse/SPARK-18547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15687937#comment-15687937
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Apache Spark commented on SPARK-18547:
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User 'vanzin' has created a pull request for this issue:
https://github.com/apache/spark/pull/15981
> Decouple I/O encryption key propagation from UserGroupInformation
> -----------------------------------------------------------------
>
> Key: SPARK-18547
> URL: https://issues.apache.org/jira/browse/SPARK-18547
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core, YARN
> Affects Versions: 2.1.0
> Reporter: Marcelo Vanzin
> Assignee: Marcelo Vanzin
>
> Currently, the encryption key used by the shuffle code is propagated using
> {{UserGroupInformation}} and thus only works on YARN. That makes it really
> painful to write unit tests in core that include encryption functionality.
> We should change that so that writing these tests is possible, and also
> because that would allow shuffle encryption to work with other cluster
> managers.
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