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https://issues.apache.org/jira/browse/SPARK-12402?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-12402.
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Resolution: Incomplete
> Memory leak in pyspark
> ----------------------
>
> Key: SPARK-12402
> URL: https://issues.apache.org/jira/browse/SPARK-12402
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Davies Liu
> Priority: Major
> Labels: bulk-closed
>
> After run some SQL query in PySpark, the DataFrame are still referenced by
> py4j Gateway, they are freed after calll `gc.collect()` in Python.
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