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https://issues.apache.org/jira/browse/FLINK-8371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16313498#comment-16313498
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Nico Kruber commented on FLINK-8371:
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Working on it - also, while doing so, I noticed that similarly,
{{SpillableSubpartitionView#nextBuffer}} is also not cleaned up (if populated
when the {{release()}} is happening).
> Buffers are not recycled in a non-spilled SpillableSubpartition upon release
> ----------------------------------------------------------------------------
>
> Key: FLINK-8371
> URL: https://issues.apache.org/jira/browse/FLINK-8371
> Project: Flink
> Issue Type: Bug
> Components: Network
> Affects Versions: 1.2.0, 1.3.0, 1.2.1, 1.3.1, 1.4.0, 1.3.2
> Reporter: Nico Kruber
> Assignee: Nico Kruber
> Priority: Blocker
>
> {{SpillableSubpartition}} only recycles buffers in its {{buffer}} queue if
> there is no view attached to it yet. If there is a view, it delegates this
> task to the view, but {{SpillableSubpartitionView}} only instructs the
> {{SpilledSubpartitionView}} to clean up in its {{releaseAllResources()}}.
> Similarly to the {{PipelinesSubpartition}} implementation, we should always
> clean up and recycle the buffers in {{SpillableSubpartition#release()}}.
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