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https://issues.apache.org/jira/browse/SPARK-40594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17614424#comment-17614424
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Apache Spark commented on SPARK-40594:
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User 'ulysses-you' has created a pull request for this issue:
https://github.com/apache/spark/pull/38159
> Eagerly release hashed relation in ShuffledHashJoin
> ---------------------------------------------------
>
> Key: SPARK-40594
> URL: https://issues.apache.org/jira/browse/SPARK-40594
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.4.0
> Reporter: XiDuo You
> Priority: Major
>
> ShuffledHashJoin releases the built hashed relation at the end of task using
> taskCompletionListener. It is not always good enough for complex sql query.
> If a smj or window on the top of the shj, then the hashed relation in shj
> would be leak. All rows have been consumed in sort before smj or window then
> the buffer can not allocate the memory which is hold by hashed relation. Then
> it causes unnecessary spill.
> It is a common case in multi-join, since AQE supports convert smj to shj at
> runtime.
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