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https://issues.apache.org/jira/browse/HIVE-8647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14188985#comment-14188985
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Gunther Hagleitner commented on HIVE-8647:
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Committed to trunk and .14.
> HIVE-8186 causes addition of same child operator multiple times
> ---------------------------------------------------------------
>
> Key: HIVE-8647
> URL: https://issues.apache.org/jira/browse/HIVE-8647
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.14.0
> Reporter: Vikram Dixit K
> Assignee: Vikram Dixit K
> Priority: Critical
> Fix For: 0.14.0
>
> Attachments: HIVE-8647.1.patch
>
>
> With HIVE-8186, the same child operator ends up getting added multiple times
> to the map operator when processing multiple files for the same alias in the
> map task.
> I believe we should also eliminate having so many mapOpCtx for the same child
> operator and instead should have only 1 per alias. However, that looks like a
> big change that may not be needed before 0.14 goes out.
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