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Posted to issues@spark.apache.org by "zhoukang (JIRA)" <ji...@apache.org> on 2017/11/16 07:29:00 UTC

[jira] [Created] (SPARK-22539) Add second order for rangepartitioner since partition number may be small if the specified key is skewed

zhoukang created SPARK-22539:
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             Summary: Add second order for rangepartitioner since partition number may be small if the specified key is skewed
                 Key: SPARK-22539
                 URL: https://issues.apache.org/jira/browse/SPARK-22539
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.1.0
            Reporter: zhoukang


The rangepartitioner generated from shuffle exchange may cause partiton skew if sort key is skewed.
We can add second order for rangepartitioner since partition number may be small if the specified key is skewed.



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