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From "Kevin Wilfong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4090) Use of hive.exec.script.allow.partial.consumption can produce partial results
Date Wed, 27 Feb 2013 23:13:12 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13588891#comment-13588891
] 

Kevin Wilfong commented on HIVE-4090:
-------------------------------------

https://reviews.facebook.net/D8979
                
> Use of hive.exec.script.allow.partial.consumption can produce partial results
> -----------------------------------------------------------------------------
>
>                 Key: HIVE-4090
>                 URL: https://issues.apache.org/jira/browse/HIVE-4090
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.11.0
>            Reporter: Kevin Wilfong
>
> When users execute use a transform script with the config hive.exec.script.allow.partial.consumption
set to true, it may produce partial results.
> When this config is set the script may close it's input pipe before its parent operator
has finished passing it rows.  In the catch block for this exception, the setDone method is
called marking the operator as done.  However, there's a separate thread running to process
rows passed from the script back to Hive via stdout.  If this thread is not done processing
rows, any rows it forwards after the setDone method is called will not be passed to its children.
 This leads to partial results.

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