subprocess: on Windows, unwanted file handles are inherited by child processes in a multithreaded application

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Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
28/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
python
Domain
operating-systems

Research direction

Start by running repro.py, repro_improved.py, testcase3.py, and testscript4.py to understand the Windows handle-inheritance failure in multithreaded applications. Review the related issue discussion and compare the reproductions; done means child processes no longer inherit unwanted file handles in the reported scenarios.

Written by the indexing model from the issue text.

Description

OS-windows stdlib topic-IO topic-subprocess
BPO 19575
Nosy @vstinner, @tjguk, @bitdancer, @codeape2
Files
  • repro.py
  • repro_improved.py
  • testcase3.py
  • testscript4.py
    		•

    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 2013-11-13.21:02:53.160>
labels = ['library', 'expert-IO', 'OS-windows']
title = 'subprocess: on Windows, unwanted file handles are inherited by child processes in a multithreaded application'
updated_at = <Date 2013-11-21.11:34:14.259>
user = 'https://github.com/codeape2'

    bugs.python.org fields:

    activity = <Date 2013-11-21.11:34:14.259>
actor = 'vstinner'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)', 'Windows', 'IO']
creation = <Date 2013-11-13.21:02:53.160>
creator = 'Bernt.R\xc3\xb8skar.Brenna'
dependencies = []
files = ['32602', '32604', '32613', '32685']
hgrepos = []
issue_num = 19575
keywords = []
message_count = 26.0
messages = ['202779', '202780', '202783', '202785', '202786', '202788', '202789', '202839', '202843', '202852', '202854', '202859', '202872', '202876', '202877', '202894', '202896', '202985', '202987', '203266', '203269', '203276', '203280', '203282', '203288', '203596']
nosy_count = 8.0
nosy_names = ['astrand', 'vstinner', 'gps', 'tim.golden', 'r.david.murray', 'Bernt.R\xc3\xb8skar.Brenna', 'neologix', 'sbt']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue19575'
versions = ['Python 3.3', 'Python 3.4']

    Dominant language
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