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https://issues.apache.org/jira/browse/HIVE-13126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15159672#comment-15159672
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Vikram Dixit K commented on HIVE-13126:
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+1. Nit: The comment should say something of the order that: Reset grace
hashjoin context so that there is no state maintained when operator/work is
retrieved from cache.
> Clean up MapJoinOperator properly to avoid object cache reuse with
> unintentional states
> ---------------------------------------------------------------------------------------
>
> Key: HIVE-13126
> URL: https://issues.apache.org/jira/browse/HIVE-13126
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Affects Versions: 2.0.0
> Reporter: Wei Zheng
> Assignee: Wei Zheng
> Attachments: HIVE-13126.1.patch
>
>
> For a given job, one task may reuse other task's object cache (plan cache)
> such as MapJoinOperator. This is fine. But if we have some dirty states left
> over, it may cause issue like wrong results.
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