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https://issues.apache.org/jira/browse/SPARK-1597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13980960#comment-13980960
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Sandeep Singh commented on SPARK-1597:
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https://github.com/apache/spark/pull/550
> Add a version of reduceByKey that takes the Partitioner as a second argument
> ----------------------------------------------------------------------------
>
> Key: SPARK-1597
> URL: https://issues.apache.org/jira/browse/SPARK-1597
> Project: Spark
> Issue Type: Bug
> Reporter: Matei Zaharia
> Assignee: Sandeep Singh
> Priority: Blocker
>
> Most of our shuffle methods can take a Partitioner or a number of partitions
> as a second argument, but for some reason reduceByKey takes the Partitioner
> as a *first* argument:
> http://spark.apache.org/docs/0.9.1/api/core/#org.apache.spark.rdd.PairRDDFunctions.
> We should deprecate that version and add one where the Partitioner is the
> second argument.
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