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https://issues.apache.org/jira/browse/DRILL-6164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16368907#comment-16368907
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ASF GitHub Bot commented on DRILL-6164:
---------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/drill/pull/1122


> Heap memory leak during parquet scan and OOM
> --------------------------------------------
>
>                 Key: DRILL-6164
>                 URL: https://issues.apache.org/jira/browse/DRILL-6164
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Vlad Rozov
>            Assignee: Vlad Rozov
>            Priority: Major
>              Labels: ready-to-commit
>             Fix For: 1.13.0
>
>
> During a scan of a large set of parquet files, Drill iterates over the set 
> initializing parquet readers. Such initialization may require a significant 
> memory usage (both heap and direct). When scan moves to the next parquet file 
> in the set, it does not remove reference to the reader from the set it 
> iterates over and does not remove references created during initialization.



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