Issue 47238: Python threading.Event().wait() depends on the system time

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This issue has been migrated to GitHub: https://github.com/python/cpython/issues/91394

classification

Title:	Python threading.Event().wait() depends on the system time
Type:	behavior	Stage:
Components:	Library (Lib)	Versions:	Python 3.8

process

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

Created on 2022年04月06日 10:19 by AleksandrAQ, last changed 2022年04月11日 14:59 by admin.

Files
File name	Uploaded	Description	Edit
reproduction.py	AleksandrAQ, 2022年04月06日 10:19	You need root privileges to change the system time.

Messages (1)
msg416851 - (view)	Author: Aleksandr (AleksandrAQ)	Date: 2022年04月06日 10:19
This happens on Ubuntu on Python versions 3.8.5 and 3.10.4 I have two threads that can change the system time to a day ago. If the change in the system time for a day occurs at the time of wait, then I hang for one day plus the waiting time. I thought Event.wait() uses a monotonous clock, but this behavior points to an absolute clock. Are there any solutions?

Messages (1)

msg416851 - (view)

Author: Aleksandr (AleksandrAQ)

Date: 2022年04月06日 10:19

This happens on Ubuntu on Python versions 3.8.5 and 3.10.4
I have two threads that can change the system time to a day ago.
If the change in the system time for a day occurs at the time of wait, then I hang for one day plus the waiting time.
I thought Event.wait() uses a monotonous clock, but this behavior points to an absolute clock.
Are there any solutions?

History
Date	User	Action	Args
2022年04月11日 14:59:58	admin	set	github: 91394
2022年04月06日 10:19:09	AleksandrAQ	create

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