GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/2668
[SPARK-3731] [PySpark] fix memory leak in PythonRDD
The parent.getOrCompute() of PythonRDD is executed in a separated thread,
it should release the memory reserved for shuffle and unrolling finally.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark leak
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/2668.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2668
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