exception unpickling error causes `multiprocessing.Pool` to hang forever

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#79,492 opened on Nov 25, 2018 2 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 25/100

Issue type: Bug
Clarity: Needs clarification
Activity status: Stale
Tech stack: python
Domain: backend

Research direction

Start at multiprocessing.Pool and investigate the exception-unpickling path described in the issue. Reproduce the reported hang and add a regression test for an exception unpickling failure; done means the pool no longer hangs forever.

Written by the indexing model from the issue text.

Description

3.7 (EOL) 3.8 (EOL) stdlib topic-multiprocessing type-bug

BPO	35311
Nosy	@avassalotti, @asottile

^{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 2018-11-25.22:02:05.526>
labels = ['3.7', '3.8', 'type-bug', 'library']
title = 'exception unpickling error causes `multiprocessing.Pool` to hang forever'
updated_at = <Date 2018-11-28.16:21:58.440>
user = 'https://github.com/asottile'

bugs.python.org fields:

activity = <Date 2018-11-28.16:21:58.440>
actor = 'SilentGhost'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2018-11-25.22:02:05.526>
creator = 'Anthony Sottile'
dependencies = []
files = []
hgrepos = []
issue_num = 35311
keywords = []
message_count = 2.0
messages = ['330397', '330398']
nosy_count = 2.0
nosy_names = ['alexandre.vassalotti', 'Anthony Sottile']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue35311'
versions = ['Python 3.7', 'Python 3.8']

Dominant language: Python
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