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https://issues.apache.org/jira/browse/SPARK-61186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon reassigned SPARK-61186:
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Assignee: Hyukjin Kwon
> Forget the tags and user context extensions of a thread when the thread ends,
> in the Rust and Python clients, as PySpark's thread locals do
> -------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-61186
> URL: https://issues.apache.org/jira/browse/SPARK-61186
> Project: Spark
> Issue Type: Bug
> Components: Connect
> Affects Versions: connect-rust-4.3.0
> Reporter: Hyukjin Kwon
> Assignee: Hyukjin Kwon
> Priority: Major
> Labels: pull-request-available
> Fix For: connect-rust-4.3.0
>
>
> SPARK-61166 made the threads of inheritable_thread_target share a copy of the
> tags of the session, keyed by thread id in the Rust core. A thread that ends
> left its entry in the map.
> The user context extensions of a thread (threadlocal_user_context_extension)
> were also kept per thread id, and never removed when the thread ended.
> A program that starts a thread per task therefore grows the maps without
> bound. PySpark's thread_local is freed with its thread.
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