Tian Gao created SPARK-54456:
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Summary: Avoid fork after import dangerous libraries
Key: SPARK-54456
URL: https://issues.apache.org/jira/browse/SPARK-54456
Project: Spark
Issue Type: Bug
Components: PySpark
Affects Versions: 4.2.0
Reporter: Tian Gao
It's impossible to guarantee the safety of a fork after multiple threads are
used.
[https://discuss.python.org/t/switching-default-multiprocessing-context-to-spawn-on-posix-as-well/21868]
That's why Python issues a warning in such cases after 3.12. However, our
daemon is not designed to be safe. It could import an arbitrary library before
fork and potentially cause a deadlock after fork.
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