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https://issues.apache.org/jira/browse/SPARK-17822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15723342#comment-15723342
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Apache Spark commented on SPARK-17822:
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User 'mengxr' has created a pull request for this issue:
https://github.com/apache/spark/pull/16154
> JVMObjectTracker.objMap may leak JVM objects
> --------------------------------------------
>
> Key: SPARK-17822
> URL: https://issues.apache.org/jira/browse/SPARK-17822
> Project: Spark
> Issue Type: Bug
> Components: SparkR
> Reporter: Yin Huai
> Assignee: Xiangrui Meng
> Attachments: screenshot-1.png
>
>
> JVMObjectTracker.objMap is used to track JVM objects for SparkR. However, we
> observed that JVM objects that are not used anymore are still trapped in this
> map, which prevents those object get GCed.
> Seems it makes sense to use weak reference (like persistentRdds in
> SparkContext).
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