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Posted to issues@spark.apache.org by "Sean R. Owen (Jira)" <ji...@apache.org> on 2021/08/28 01:10:00 UTC

[jira] [Created] (SPARK-36603) Use WeakReference over SoftReference in LevelDB to avoid retaining iterator refs

Sean R. Owen created SPARK-36603:
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             Summary: Use WeakReference over SoftReference in LevelDB to avoid retaining iterator refs
                 Key: SPARK-36603
                 URL: https://issues.apache.org/jira/browse/SPARK-36603
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
    Affects Versions: 3.1.2
            Reporter: Sean R. Owen
            Assignee: Sean R. Owen


See discussion at https://github.com/apache/spark/pull/28769#issuecomment-906722390

The SoftReference used to track iterators in LevelDB can prevent them from being GCed early enough, thus finalized and closed. A WeakReference would be more readily collected, and solves an apparent actual issue running a 3.1.x SHS.



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