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Posted to dev@hive.apache.org by "wangwenli (JIRA)" <ji...@apache.org> on 2016/11/01 16:08:58 UTC

[jira] [Created] (HIVE-15104) Hive on Spark generate more shuffle data than hive on mr

wangwenli created HIVE-15104:
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             Summary: Hive on Spark generate more shuffle data than hive on mr
                 Key: HIVE-15104
                 URL: https://issues.apache.org/jira/browse/HIVE-15104
             Project: Hive
          Issue Type: Bug
          Components: Spark
    Affects Versions: 1.2.1
            Reporter: wangwenli
            Priority: Critical


the same sql,  running on spark  and mr engine, will generate different size of shuffle data.

i think it is because of hive on mr just serialize part of HiveKey, but hive on spark which using kryo will serialize full of Hivekey object.  

what is your opionion?



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