Issue 39941: multiprocessing: Process.join() should emit a warning if the process is killed by a signal

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This issue has been migrated to GitHub: https://github.com/python/cpython/issues/84122

classification

Type:	Stage:
Title:	multiprocessing: Process.join() should emit a warning if the process is killed by a signal
Components:	Library (Lib)	Versions:	Python 3.9

process

Dependencies:	Superseder:
Status:	open	Resolution:
Assigned To:	Nosy List:	vstinner
Priority:	normal	Keywords:

Created on 2020年03月11日 23:10 by vstinner, last changed 2022年04月11日 14:59 by admin.

Messages (1)
msg363980 - (view)	Author: STINNER Victor (vstinner) * (Python committer)	Date: 2020年03月11日 23:10
While debugging bpo-39877, I was surprising that Python crash was only noticed on FreeBSD by a side effect. On FreeBSD, coredump files are created in the current directory. But Python regrtest fails if a test creates a file and doesn't remove it. I found that multiprocessing.Process.join() deletes the subprocess.Popen object as soon as the process completes, but it doesn't log any warning if the process is killed by a signal. The caller has no way to be notified. I propose to enhance Process to log a warning if such case happens.

Messages (1)

msg363980 - (view)

Author: STINNER Victor (vstinner) * (Python committer)

Date: 2020年03月11日 23:10

While debugging bpo-39877, I was surprising that Python crash was only noticed on FreeBSD by a side effect. On FreeBSD, coredump files are created in the current directory. But Python regrtest fails if a test creates a file and doesn't remove it.
I found that multiprocessing.Process.join() deletes the subprocess.Popen object as soon as the process completes, but it doesn't log any warning if the process is killed by a signal. The caller has no way to be notified.
I propose to enhance Process to log a warning if such case happens.

History
Date	User	Action	Args
2022年04月11日 14:59:28	admin	set	github: 84122
2020年03月11日 23:10:56	vstinner	create

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