python / python/cpython

Cannot pass a SyncManager proxy to a multiprocessing subprocess on Windows

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OS-windows topic-multiprocessing type-bug
Dominant language
Python
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Description

BPO 33088
Nosy @pfmoore, @pitrou, @tjguk, @zware, @zooba, @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 2018-03-16.18:10:25.896>
labels = ['type-bug', 'OS-windows']
title = 'Cannot pass a SyncManager proxy to a multiprocessing subprocess on Windows'
updated_at = <Date 2018-03-16.20:08:00.306>
user = 'https://bugs.python.org/jjdmon'

bugs.python.org fields:

activity = <Date 2018-03-16.20:08:00.306>
actor = 'ned.deily'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Windows']
creation = <Date 2018-03-16.18:10:25.896>
creator = 'jjdmon'
dependencies = []
files = []
hgrepos = []
issue_num = 33088
keywords = []
message_count = 1.0
messages = ['313964']
nosy_count = 7.0
nosy_names = ['paul.moore', 'pitrou', 'tim.golden', 'zach.ware', 'steve.dower', 'davin', 'jjdmon']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue33088'
versions = ['Python 3.6']

Contributor guide

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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

The issue names no files, tests, or entry points beyond Windows multiprocessing and SyncManager proxies. Start by reproducing the failure on Python 3.6 with a Windows subprocess, then trace the multiprocessing and manager-proxy paths; done means the proxy can be passed successfully and the behavior is covered by a regression test.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
operating-systems
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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