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https://issues.apache.org/jira/browse/SPARK-21492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16844313#comment-16844313
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Xingbo Jiang commented on SPARK-21492:
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I'm working on this, will post a simple design doc in a few days.
> Memory leak in SortMergeJoin
> ----------------------------
>
> Key: SPARK-21492
> URL: https://issues.apache.org/jira/browse/SPARK-21492
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.2.0, 2.3.0, 2.3.1, 3.0.0
> Reporter: Zhan Zhang
> Priority: Major
>
> In SortMergeJoin, if the iterator is not exhausted, there will be memory leak
> caused by the Sort. The memory is not released until the task end, and cannot
> be used by other operators causing performance drop or OOM.
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