Worker stall in multiprocessing.Pool

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#70,094 opened on Dec 18, 2015 1 comment 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: operating-systems

Research direction

Start at Python's multiprocessing.Pool implementation and investigate the reported worker stall described in BPO issue 25906. Reproduce the behavior on the listed Python versions, identify the stalled worker condition, and verify that Pool workers no longer stall.

Written by the indexing model from the issue text.

Description

topic-multiprocessing type-bug

BPO	25906
Nosy	@applio

^{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 2015-12-18.14:40:44.774>
labels = ['type-bug']
title = 'Worker stall in multiprocessing.Pool'
updated_at = <Date 2015-12-18.16:38:09.972>
user = 'https://bugs.python.org/chroxvi'

bugs.python.org fields:

activity = <Date 2015-12-18.16:38:09.972>
actor = 'r.david.murray'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2015-12-18.14:40:44.774>
creator = 'chroxvi'
dependencies = []
files = []
hgrepos = []
issue_num = 25906
keywords = []
message_count = 1.0
messages = ['256684']
nosy_count = 3.0
nosy_names = ['sbt', 'davin', 'chroxvi']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue25906'
versions = ['Python 2.7', 'Python 3.3', 'Python 3.4', 'Python 3.5']

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