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https://issues.apache.org/jira/browse/HIVE-10704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14544766#comment-14544766
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Alexander Pivovarov commented on HIVE-10704:
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you calling "desc.getParentDataSizes().get(pos)" two times...
Jason, can you "rbt post -g yes" and attach the link?
> Errors in Tez HashTableLoader when estimated table size is 0
> ------------------------------------------------------------
>
> Key: HIVE-10704
> URL: https://issues.apache.org/jira/browse/HIVE-10704
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Jason Dere
> Assignee: Jason Dere
> Attachments: HIVE-10704.1.patch
>
>
> Couple of issues:
> - If the table sizes in MapJoinOperator.getParentDataSizes() are 0 for all
> tables, the largest small table selection is wrong and could select the large
> table (which results in NPE)
> - The memory estimates can either divide-by-zero, or allocate 0 memory if the
> table size is 0. Try to come up with a sensible default for this.
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