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https://issues.apache.org/jira/browse/SPARK-27337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16807406#comment-16807406
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Sandeep Katta commented on SPARK-27337:
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I will test this scenario and if required will raise PR for the same
> QueryExecutionListener never cleans up listeners from the bus after
> SparkSession is closed
> ------------------------------------------------------------------------------------------
>
> Key: SPARK-27337
> URL: https://issues.apache.org/jira/browse/SPARK-27337
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 3.0.0
> Reporter: Vinoo Ganesh
> Priority: Critical
> Attachments: image001-1.png
>
>
> As a result of
> [https://github.com/apache/spark/commit/9690eba16efe6d25261934d8b73a221972b684f3],
> it looks like there is a memory leak (specifically
> [https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/util/QueryExecutionListener.scala#L131).]
>
> Because the Listener Bus on the context still has a reference to the listener
> (even after the SparkSession is cleared), they are never cleaned up. This
> means that if you close and remake spark sessions fairly frequently, you're
> leaking every single time.
>
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