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https://issues.apache.org/jira/browse/HIVE-5149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13750551#comment-13750551
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Pala M Muthaia commented on HIVE-5149:
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Currently, there is a workaround to avoid this bug, by turning off all reduce
deduplication optimization: hive.optimize.reducededuplication = false. However,
that will affect other valid deduplications also, so the user has to be
educated enough to turn it off selectively, or we turn it off globally in
hive-site.xml, but give up performance in other cases.
So, using this config is only a short term workaround.
> ReduceSinkDeDuplication can pick the wrong partitioning columns
> ---------------------------------------------------------------
>
> Key: HIVE-5149
> URL: https://issues.apache.org/jira/browse/HIVE-5149
> Project: Hive
> Issue Type: Bug
> Reporter: Yin Huai
> Assignee: Yin Huai
>
> https://mail-archives.apache.org/mod_mbox/hive-user/201308.mbox/%3CCAG6Lhyex5XPwszpihKqkPRpzri2k=m4qgc+cpar5yvr8sjt...@mail.gmail.com%3E
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