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https://issues.apache.org/jira/browse/SPARK-35498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17365309#comment-17365309
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Apache Spark commented on SPARK-35498:
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User 'HyukjinKwon' has created a pull request for this issue:
https://github.com/apache/spark/pull/32962
> Add an API "inheritable_thread_target" which return a wrapped thread target
> for pyspark pin thread mode
> -------------------------------------------------------------------------------------------------------
>
> Key: SPARK-35498
> URL: https://issues.apache.org/jira/browse/SPARK-35498
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Affects Versions: 3.2.0
> Reporter: Weichen Xu
> Assignee: Weichen Xu
> Priority: Major
> Fix For: 3.2.0
>
>
> In pyspark, user may create some threads, not via `Thread` object, but via
> some parallel helper function such as:
> `thread_pool.imap_unordered`
> In this case, we need create a function wrapper, used in pin thread mode, The
> wrapper function, before calling original thread target, it inherits the
> inheritable properties specific to JVM thread such as
> ``InheritableThreadLocal``, and after original thread target return,
> garbage-collects the Python thread instance and also closes the connection
> which finishes JVM thread correctly.
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