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raising a BaseException in a multiprocessing worker pool causes process hang #101081

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raising a BaseException in a multiprocessing worker pool causes process hang #101081

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ehudhala
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raising a BaseException in a worker pool causes us not to put the result in the queue and subsequently for the whole process to hang, catching BaseException alleviates this issue.

A small example reproducing the issue:

from multiprocessing import Pool

def foo():
    raise BaseException()

Pool().apply(foo)

@ehud-nym
raising a BaseException in a worker pool causes us not to put the res…
9fb1eed 
…ult in the queue and subsequently for the whole process to hang, catching BaseException alleviates this issue
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Most changes to Python require a NEWS entry.

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ghost commented Jan 16, 2023 •
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Most changes to Python require a NEWS entry.

Please add it using the blurb_it web app or the blurb command-line tool.

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python-cla-bot bot commented Apr 6, 2025 •
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@ehudhala @bedevere-bot @ehud-nym