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Posted to issues@spark.apache.org by "Vinoo Ganesh (JIRA)" <ji...@apache.org> on 2019/04/01 16:15:00 UTC

[jira] [Created] (SPARK-27337) QueryExecutionListener never cleans up listeners from the bus after SparkSession is closed

Vinoo Ganesh created SPARK-27337:
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             Summary: 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: 2.4.0, 3.0.0
            Reporter: Vinoo Ganesh
         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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