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Python threading.Event().wait() depends on the system time #91394
Description
| BPO | 47238 |
|---|---|
| Nosy | @AleksandrAQ |
| Files |
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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GitHub fields:
assignee = None
closed_at = None
created_at = <Date 2022-04-06.10:19:09.231>
labels = ['3.8', 'type-bug', 'library']
title = 'Python threading.Event().wait() depends on the system time'
updated_at = <Date 2022-04-06.10:19:09.231>
user = 'https://github.com/AleksandrAQ'bugs.python.org fields:
activity = <Date 2022-04-06.10:19:09.231>
actor = 'AleksandrAQ'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2022-04-06.10:19:09.231>
creator = 'AleksandrAQ'
dependencies = []
files = ['50725']
hgrepos = []
issue_num = 47238
keywords = []
message_count = 1.0
messages = ['416851']
nosy_count = 1.0
nosy_names = ['AleksandrAQ']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue47238'
versions = ['Python 3.8']
Activity
AleksandrAQ commentedon Apr 6, 2022
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?
duaneg commentedon Apr 19, 2025
I cannot reproduce this on the current
HEAD, and looking through the logs I believe it was fixed by gh-28662 by @vstinner and released inv3.11.0. I think this issue can be closed as fixed.