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https://issues.apache.org/jira/browse/HIVE-10131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14396063#comment-14396063
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Matt McCline commented on HIVE-10131:
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Note there are "concurrent" changes occurring to WriteBuffers (see HIVE-10128).
> LLAP: BytesBytesMultiHashMap and mapjoin container should reuse refs
> --------------------------------------------------------------------
>
> Key: HIVE-10131
> URL: https://issues.apache.org/jira/browse/HIVE-10131
> Project: Hive
> Issue Type: Sub-task
> Reporter: Sergey Shelukhin
> Assignee: Matt McCline
> Attachments: HIVE-10131.01.patch, HIVE-10131.02.patch,
> HIVE-10131.03.patch
>
>
> Refs are always allocated and cleared. Should be reused.
> Iterator is another option
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