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From "Namit Jain (Created) (JIRA)" <>
Subject [jira] [Created] (HIVE-2929) race condition in DAG execute tasks for hive
Date Fri, 06 Apr 2012 06:10:33 GMT
race condition in DAG execute tasks for hive

                 Key: HIVE-2929
             Project: Hive
          Issue Type: Bug
            Reporter: Namit Jain

select ...
SubQuery involving MapReduce
union all
SubQuery involving MapReduce


select ...
(SubQuery involving MapReduce)
(SubQuery involving MapReduce)

If both the subQueries finish at nearly the same time, there is a race 
condition in which the results of the subQuery finishing last will be completely missed.

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