[jira] [Created] (HIVE-14160) Reduce-task costs a long time to finish on the condition that the certain sql "select a,distinct(b) group by a" has been executed on the data which has skew distribution

Tue, 05 Jul 2016 04:26:48 -0700 

marymwu created HIVE-14160:
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             Summary: Reduce-task costs a long time to finish on the condition 
that the certain sql "select a,distinct(b) group by a" has been executed on the 
data which has skew distribution
                 Key: HIVE-14160
                 URL: https://issues.apache.org/jira/browse/HIVE-14160
             Project: Hive
          Issue Type: Improvement
          Components: hpl/sql
    Affects Versions: 1.1.0
            Reporter: marymwu


Reduce-task costs a long time to finish on the condition that the certain sql 
"select a,distinct(b) group by a" has been executed on the data which has skew 
distribution

data scale: 64G



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