GH-84559: Deprecate fork being the multiprocessing default. by gpshead · Pull Request #100618 · python/cpython · GitHub

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gpshead:multiprocessing/deprecate-fork-default

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Pull requests 2.6k

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multiprocessing's default posix start method of 'fork' is broken: change to `'forkserver' || 'spawn' #84559

: Deprecate fork being the multiprocessing default.

topic-multiprocessing

awaiting core review

address CI test failures?

the new warning needs no pickle name mapping

avoid DeprecationWarnings vs -Werror

prefer forkserver over fork for concurrent.futures

explicitly use spawn for simple process launchers.

warn from concurrent.futures, reword things.

avoid double warning in futures

Cleanup messages, test futures warning.

cleanup warn stacklevel logic

Document all the things!

Have all doctests use 'spawn'.

Correct warning stacklevel for Manager.

more doctest cleanup.

View reviewed changes

docs: add the implicit i

gh-39615: Add warnings.warn() skip_file_prefixes support #100840

Merge branch 'main' into multiprocessing/deprecate-fork-default

Use skip_file_prefixes.

use the modern warnings API, doc updates.

documentation cleanup

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Remove an unused variable.

doc typo fix, unnecessary method change revert.

Add What's New entries.

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot wasm32-emscripten node (dynamic linking) 3.x has failed when building commit 0ca67e6.