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https://issues.apache.org/jira/browse/SPARK-4719?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14232804#comment-14232804
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Apache Spark commented on SPARK-4719:
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User 'rxin' has created a pull request for this issue:
https://github.com/apache/spark/pull/3578
> Consolidate various narrow dep RDD classes with MapPartitionsRDD
> ----------------------------------------------------------------
>
> Key: SPARK-4719
> URL: https://issues.apache.org/jira/browse/SPARK-4719
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.2.0
> Reporter: Reynold Xin
> Assignee: Reynold Xin
>
> Seems like we don't really need MappedRDD, MappedValuesRDD,
> FlatMappedValuesRDD, FilteredRDD, GlommedRDD. They can all be implemented
> directly using MapPartitionsRDD.
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