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test_logging hangs if /etc/hosts only aliases "localhost" to ::1 #73458
Description
| BPO | 29272 |
|---|---|
| Nosy | @vstinner, @KMiNT21 |
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 2017-01-14.01:37:00.339>
labels = ['type-bug', 'tests']
title = 'test_logging hangs if /etc/hosts only aliases "localhost" to ::1'
updated_at = <Date 2018-07-02.13:32:07.214>
user = 'https://bugs.python.org/phantal'bugs.python.org fields:
activity = <Date 2018-07-02.13:32:07.214>
actor = 'vstinner'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Tests']
creation = <Date 2017-01-14.01:37:00.339>
creator = 'phantal'
dependencies = []
files = []
hgrepos = []
issue_num = 29272
keywords = []
message_count = 3.0
messages = ['285452', '318266', '320881']
nosy_count = 3.0
nosy_names = ['vstinner', 'phantal', 'KMiNT21']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue29272'
versions = ['Python 3.6']Linked PRs
- gh-73458: Fix logging.config.listen() on a host without an IPv4 address #154491
- [3.15] gh-73458: Fix logging.config.listen() on a host without an IPv4 address (GH-154491) #154616
- [3.14] gh-73458: Fix logging.config.listen() on a host without an IPv4 address (GH-154491) #154617
- [3.13] gh-73458: Fix logging.config.listen() on a host without an IPv4 address (GH-154491) #154618
Activity
phantal commentedon Jan 14, 2017
On some of the linux boxes on our (air-gapped, if that matters) network it looks like some of them were mis-configured and their /etc/hosts file looks something like this:
... whereas for other linux machines not exhibiting this problem:
It appears this is causing test_logging to hang while running SocketHandlerTest.
Unfortunately I don't have administrative privileges so I'm not able to prove I'm right. I only have circumstantial evidence, but no machine I tested (about 20 machines) contradicts what I stated above.
KMiNT21 commentedon May 31, 2018
The same bug for me:
3.6.5 and 3.6.4 -hangs on test_logging forever.
Thanks to this report - I've commented some lines in /etc/host
and after 'test_logging' passed OK!
vstinner commentedon Jul 2, 2018
I confirm the issue. test_logging hangs if the resolution of the hostname fails with a timeout.
I worked around the issue by adding my hostname to /etc/hosts.
serhiy-storchaka commentedon Jul 22, 2026
Should be fixed by #154491.
gh-73458: Fix logging.config.listen() on a host without an IPv4 addre…
[3.13] gh-73458: Fix logging.config.listen() on a host without an IPv…
[3.14] gh-73458: Fix logging.config.listen() on a host without an IPv…
[3.15] gh-73458: Fix logging.config.listen() on a host without an IPv…
pythongh-73458: Fix logging.config.listen() on a host without an IPv4…