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https://issues.apache.org/jira/browse/DRILL-4215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17419802#comment-17419802
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Vitalii Diravka commented on DRILL-4215:
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It was resolved in 6dea4299:
[https://github.com/apache/drill/pull/308]
> Transfer ownership of buffers when doing transfers
> --------------------------------------------------
>
> Key: DRILL-4215
> URL: https://issues.apache.org/jira/browse/DRILL-4215
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Steven Phillips
> Assignee: Steven Phillips
> Priority: Major
>
> The new allocator has the feature of allowing the transfer of ownership of
> buffers from one allocator to another. We should make use of this feature by
> transferring ownership whenever we transfer buffers between vectors. This
> will allow better tracking of how much memory operators are holding on to.
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