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Posted to dev@hive.apache.org by "Szehon Ho (JIRA)" <ji...@apache.org> on 2016/03/07 19:51:40 UTC

[jira] [Created] (HIVE-13217) Replication for HoS mapjoin small file needs to respect dfs.replication.max

Szehon Ho created HIVE-13217:
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             Summary: Replication for HoS mapjoin small file needs to respect dfs.replication.max
                 Key: HIVE-13217
                 URL: https://issues.apache.org/jira/browse/HIVE-13217
             Project: Hive
          Issue Type: Bug
          Components: Spark
    Affects Versions: 2.0.0, 1.2.1
            Reporter: Szehon Ho
            Assignee: Xuefu Zhang
            Priority: Minor


Currently Hive on Spark Mapjoin replicates small table file to a hard-coded value of 10.  See SparkHashTableSinkOperator.MIN_REPLICATION. 

When dfs.replication.max is less than 10, HoS query fails.  This constant should cap at dfs.replication.max.

Normally dfs.replication.max seems set at 512.



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