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https://issues.apache.org/jira/browse/SPARK-54456?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon reassigned SPARK-54456:
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Assignee: Tian Gao
> 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
> Assignee: Tian Gao
> Priority: Major
> Labels: pull-request-available
>
> 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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