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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12562) Enabling native fast hash table can cause incorrect results
Date Wed, 02 Dec 2015 21:24:11 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15036658#comment-15036658
] 

Sergey Shelukhin commented on HIVE-12562:
-----------------------------------------

Is there a repro?

> Enabling native fast hash table can cause incorrect results
> -----------------------------------------------------------
>
>                 Key: HIVE-12562
>                 URL: https://issues.apache.org/jira/browse/HIVE-12562
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Siddharth Seth
>
> Enabling "hive.vectorized.execution.mapjoin.native.fast.hashtable.enabled" causes incorrect
results when running with LLAP.
> I believe this does not happen for simple container runs. However, it's possible that
caching of these tables, or using the same table more than once causes issues - which may
be seen with container reuse.
> The results vary by a small percentage.
> e.g. 82270, 82267 <- Two results for the same query run back to back.
> cc [~mmccline]



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