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https://issues.apache.org/jira/browse/SPARK-4655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14312458#comment-14312458
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Ilya Ganelin commented on SPARK-4655:
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Hi [~joshrosen], I'd be happy to work on this. Thanks!
> Split Stage into ShuffleMapStage and ResultStage subclasses
> -----------------------------------------------------------
>
> Key: SPARK-4655
> URL: https://issues.apache.org/jira/browse/SPARK-4655
> Project: Spark
> Issue Type: Sub-task
> Components: Spark Core
> Reporter: Josh Rosen
> Assignee: Josh Rosen
>
> The scheduler's {{Stage}} class has many fields which are only applicable to
> result stages or shuffle map stages. As a result, I think that it makes
> sense to make {{Stage}} into an abstract base class with two subclasses,
> {{ResultStage}} and {{ShuffleMapStage}}. This would improve the
> understandability of the DAGScheduler code.
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