Message 387950 - Python tracker

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In-reply-to
Author	mark.dickinson
Recipients	igorvm, mark.dickinson
Date	2021年03月02日.18:32:56
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1614709976.91.0.9679369133.issue43375@roundup.psfhosted.org>

Content
I'm not sure that this counts as a bug. Each non-daemon thread adds a lock to the threading._shutdown_locks set: https://github.com/python/cpython/blob/8b795ab5541d8a4e69be4137dfdc207714270b77/Lib/threading.py#L933-L935. That lock is removed when the thread is "join"ed: https://github.com/python/cpython/blob/8b795ab5541d8a4e69be4137dfdc207714270b77/Lib/threading.py#L988-L990 So the simple solution is to make sure that you always join your threads (which I'd expect normal code to do for non-daemon threads anyway), or to make your threads daemon threads.

Content

I'm not sure that this counts as a bug.
Each non-daemon thread adds a lock to the threading._shutdown_locks set: https://github.com/python/cpython/blob/8b795ab5541d8a4e69be4137dfdc207714270b77/Lib/threading.py#L933-L935.
That lock is removed when the thread is "join"ed: https://github.com/python/cpython/blob/8b795ab5541d8a4e69be4137dfdc207714270b77/Lib/threading.py#L988-L990
So the simple solution is to make sure that you always join your threads (which I'd expect normal code to do for non-daemon threads anyway), or to make your threads daemon threads.

History
Date	User	Action	Args
2021年03月02日 18:32:56	mark.dickinson	set	recipients: + mark.dickinson, igorvm
2021年03月02日 18:32:56	mark.dickinson	set	messageid: <1614709976.91.0.9679369133.issue43375@roundup.psfhosted.org>
2021年03月02日 18:32:56	mark.dickinson	link	issue43375 messages
2021年03月02日 18:32:56	mark.dickinson	create

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