test_logging hangs on an IPv6-only host

@gpshead

BPO	37895
Nosy	@gpshead

^{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 = 'https://github.com/gpshead'
closed_at = None
created_at = <Date 2019-08-20.18:26:19.132>
labels = ['3.7', '3.8', 'type-bug', 'tests', '3.9']
title = 'test_logging hangs on an IPv6-only host'
updated_at = <Date 2019-08-20.18:26:19.132>
user = 'https://github.com/gpshead'

bugs.python.org fields:

activity = <Date 2019-08-20.18:26:19.132>
actor = 'gregory.p.smith'
assignee = 'gregory.p.smith'
closed = False
closed_date = None
closer = None
components = ['Tests']
creation = <Date 2019-08-20.18:26:19.132>
creator = 'gregory.p.smith'
dependencies = []
files = []
hgrepos = []
issue_num = 37895
keywords = []
message_count = 1.0
messages = ['350031']
nosy_count = 1.0
nosy_names = ['gregory.p.smith']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'needs patch'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue37895'
versions = ['Python 3.7', 'Python 3.8', 'Python 3.9']

test_logging hangs when run on an IPv6-only host. (127.0.0.1 isn't even available)

test_listen_config_10_ok (test.test_logging.ConfigDictTest) ... Exception in thread Thread-3:
Traceback (most recent call last):
  File "/home/greg/oss/cpython/Lib/threading.py", line 938, in _bootstrap_inner
    self.run()
  File "/home/greg/oss/cpython/Lib/logging/config.py", line 918, in run
    server = self.rcvr(port=self.port, handler=self.hdlr,
  File "/home/greg/oss/cpython/Lib/logging/config.py", line 885, in __init__
    ThreadingTCPServer.__init__(self, (host, port), handler)
  File "/home/greg/oss/cpython/Lib/socketserver.py", line 452, in __init__
    self.server_bind()
  File "/home/greg/oss/cpython/Lib/socketserver.py", line 466, in server_bind
    self.socket.bind(self.server_address)
OSError: [Errno 99] Cannot assign requested address

possibly more, but it's hung here.

I'm preparing an IPv6-only buildbot.

Should be fixed by #154491.

pythongh-73458: Fix logging.config.listen() on a host without an IPv4…

[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…

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test_logging hangs on an IPv6-only host #82076

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test_logging hangs on an IPv6-only host #82076

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gpshead commented on Aug 20, 2019

serhiy-storchaka commented on Jul 22, 2026

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