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From "Siying Dong (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2929) race condition in DAG execute tasks for hive
Date Fri, 06 Apr 2012 22:28:15 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13248940#comment-13248940
] 

Siying Dong commented on HIVE-2929:
-----------------------------------

+1
committed. Thanks Namit!
                
> race condition in DAG execute tasks for hive
> --------------------------------------------
>
>                 Key: HIVE-2929
>                 URL: https://issues.apache.org/jira/browse/HIVE-2929
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>         Attachments: hive.2929.1.patch
>
>
> select ...
> (
> SubQuery involving MapReduce
> union all
> SubQuery involving MapReduce
> );
> or 
> select ...
> (SubQuery involving MapReduce)
> join
> (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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