[jira] [Created] (SPARK-2278) groupBy should support custom comparator

[Hans Uhlig (JIRA)]

Hans Uhlig created SPARK-2278:
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             Summary: groupBy should support custom comparator
                 Key: SPARK-2278
                 URL: https://issues.apache.org/jira/browse/SPARK-2278
             Project: Spark
          Issue Type: New Feature
          Components: Java API
    Affects Versions: 1.0.0
            Reporter: Hans Uhlig


To maintain parity with MapReduce you should be able to specify a custom key 
equality function in groupBy similar to sortByKey. 



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