python / python/cpython

test_multiprocessing_fork hangs on an IPv6-only host

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3.7 (EOL) 3.8 (EOL) 3.9 (EOL) tests topic-multiprocessing type-bug
Dominant language
Python
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Forks
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PR merge metrics
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Description

BPO 37896
Nosy @gpshead, @vstinner

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 2019-08-20.18:30:31.680>
labels = ['3.7', '3.8', 'type-bug', 'tests', '3.9']
title = 'test_multiprocessing_fork hangs on an IPv6-only host'
updated_at = <Date 2019-09-24.12:03:19.324>
user = 'https://github.com/gpshead'

bugs.python.org fields:

activity = <Date 2019-09-24.12:03:19.324>
actor = 'vstinner'
assignee = 'gregory.p.smith'
closed = False
closed_date = None
closer = None
components = ['Tests']
creation = <Date 2019-08-20.18:30:31.680>
creator = 'gregory.p.smith'
dependencies = []
files = []
hgrepos = []
issue_num = 37896
keywords = []
message_count = 1.0
messages = ['350032']
nosy_count = 2.0
nosy_names = ['gregory.p.smith', 'vstinner']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'needs patch'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue37896'
versions = ['Python 3.7', 'Python 3.8', 'Python 3.9']

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the test_multiprocessing_fork test and reproduce the hang on an IPv6-only host, then trace which multiprocessing or networking operation fails to complete. Done means the test completes reliably in that environment and the relevant test suite passes.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
networking, testing
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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