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https://issues.apache.org/jira/browse/HIVE-5056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13736276#comment-13736276
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Chen Chun commented on HIVE-5056:
---------------------------------
Hi, [~navis]. I and [~wzc1989] finally find the problem after a week of
seeking. Since "deal".hashCode()%16=12, "dim_pay_date".hashCode()%16=12, in
SemanticAnalyzer#genJoinOperatorChildren, we put "deal", "dim_pay_date" in hash
map in sequence, however in MapJoinProcessor#convertMapJoin, we put
"dim_pay_date", "deal" in hash map in sequence. And because of hash collision,
the traversal order is related to the order of elements putting in the hashmap
and result in bug.
> MapJoinProcessor ignores order of values in removing RS
> -------------------------------------------------------
>
> Key: HIVE-5056
> URL: https://issues.apache.org/jira/browse/HIVE-5056
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Navis
> Assignee: Navis
> Attachments: HIVE-5056.D12147.1.patch
>
>
> http://www.mail-archive.com/user@hive.apache.org/msg09073.html
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