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gh-159118: Use MTA COM initialization in _wmi to avoid crashes under load - #159463

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zooba merged 1 commit into
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utam-1:gh-159118-wmi-mta
Nov 3, 2026
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gh-159118: Use MTA COM initialization in _wmi to avoid crashes under load#159463
zooba merged 1 commit into
python:mainfrom
utam-1:gh-159118-wmi-mta

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@utam-1

@utam-1 utam-1 commented Oct 15, 2026 •
edited by bedevere-app Bot
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Initialize COM with COINIT_MULTITHREADED instead of COINIT_APARTMENTTHREADED in _wmimodule.cpp to prevent hidden window registration contention and RPC_NT_INTERNAL_ERROR crashes under high concurrency.

@utam-1
pythongh-159118: Use MTA COM initialization in _wmi to avoid crashes …
3ad4bef 
…under load

Initialize COM with COINIT_MULTITHREADED instead of COINIT_APARTMENTTHREADED in _wmimodule.cpp to prevent hidden window registration contention and RPC_NT_INTERNAL_ERROR crashes under high concurrency.
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utam-1 requested a review from a team as a code owner October 15, 2026 13:23
@bedevere-app bedevere-app Bot mentioned this pull request Oct 15, 2026
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@kumaraditya303 kumaraditya303 added needs backport to 3.14 bugs and security fixes needs backport to 3.15 bugs and security fixes labels Nov 3, 2026
@kumaraditya303
kumaraditya303 requested a review from zooba November 3, 2026 15:58
@zooba
zooba merged commit 99799a9 into python:main Nov 3, 2026
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@miss-islington-app

miss-islington-app Bot commented Nov 3, 2026

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Thanks @utam-1 for the PR, and @zooba for merging it 🌮🎉.. I'm working now to backport this PR to: 3.14, 3.15.
🐍🍒⛏🤖

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bedevere-app Bot commented Nov 3, 2026

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GH-161256 is a backport of this pull request to the 3.15 branch.

@bedevere-app bedevere-app Bot removed the needs backport to 3.15 bugs and security fixes label Nov 3, 2026
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bedevere-app Bot commented Nov 3, 2026

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GH-161257 is a backport of this pull request to the 3.14 branch.

@bedevere-app bedevere-app Bot removed the needs backport to 3.14 bugs and security fixes label Nov 3, 2026
zooba pushed a commit that referenced this pull request Nov 3, 2026
@miss-islington @utam-1
[3.14] gh-159118: Use multithreaded COM initialization in _wmi (GH-15…
6802496 
…9463)

gh-159118: Use multithreaded COM initialization in _wmi (GH-159463)
(cherry picked from commit 99799a9)

Co-authored-by: Uttam Bhadauriya <uttamsinghbhadoriya23@gmail.com>
zooba pushed a commit that referenced this pull request Nov 3, 2026
@miss-islington @utam-1
[3.15] gh-159118: Use multithreaded COM initialization in _wmi (GH-15…
37f4276 
…9463)

gh-159118: Use multithreaded COM initialization in _wmi (GH-159463)
(cherry picked from commit 99799a9)

Co-authored-by: Uttam Bhadauriya <uttamsinghbhadoriya23@gmail.com>
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