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GH-84559: Deprecate fork being the multiprocessing default. (#100618)

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This starts the process. Users who don't specify their own start method
and use the default on platforms where it is 'fork' will see a
DeprecationWarning upon multiprocessing.Pool() construction or upon
multiprocessing.Process.start() or concurrent.futures.ProcessPool use.

See the related issue and documentation within this change for details.
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Gregory P. Smith 2023-02-02 15:50:35 -08:00 • committed by GitHub
parent 618b7a8260
commit 0ca67e6313
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16 changed files with 284 additions and 63 deletions
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5
Lib/test/test_logging.py
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@ -4759,8 +4759,9 @@ class LogRecordTest(BaseTest):
# In other processes, processName is correct when multiprocessing in imported,
# but it is (incorrectly) defaulted to 'MainProcess' otherwise (bpo-38762).
import multiprocessing
parent_conn, child_conn = multiprocessing.Pipe()
p = multiprocessing.Process(
mp = multiprocessing.get_context('spawn')
parent_conn, child_conn = mp.Pipe()
p = mp.Process(
target=self._extract_logrecord_process_name,
args=(2, LOG_MULTI_PROCESSING, child_conn,)
)