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subprocess.communicate() does not receive full output from the called process. #66264

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juj mannequin opened this issue Jul 25, 2014 · 2 comments
Closed

subprocess.communicate() does not receive full output from the called process. #66264

juj mannequin opened this issue Jul 25, 2014 · 2 comments
Labels
stdlib Python modules in the Lib dir type-bug An unexpected behavior, bug, or error

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@juj
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Mannequin

juj mannequin commented Jul 25, 2014

BPO 22066

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 = <Date 2014-07-27.17:10:10.884>
created_at = <Date 2014-07-25.13:52:23.912>
labels = ['invalid', 'type-bug', 'library']
title = 'subprocess.communicate() does not receive full output from the called process.'
updated_at = <Date 2014-07-27.17:10:10.883>
user = 'https://bugs.python.org/juj'

bugs.python.org fields:

activity = <Date 2014-07-27.17:10:10.883>
actor = 'ezio.melotti'
assignee = 'none'
closed = True
closed_date = <Date 2014-07-27.17:10:10.884>
closer = 'ezio.melotti'
components = ['Library (Lib)']
creation = <Date 2014-07-25.13:52:23.912>
creator = 'juj'
dependencies = []
files = []
hgrepos = []
issue_num = 22066
keywords = []
message_count = 2.0
messages = ['223950', '224146']
nosy_count = 1.0
nosy_names = ['juj']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue22066'
versions = ['Python 2.7']
@juj
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Mannequin Author

juj mannequin commented Jul 25, 2014

When Python 2.7 executes a Node .js application that prints to stdout and subsequently exits, Python does not capture full output printed by that application.

Steps to repro:

  1. Download and unzip http://clb.demon.fi/bugs/python_proc_bug.zip
  2. Run run_test.bat

Observed result: The .bat script prints:

Executing 'node jsfile.js' directly from command line. The js file outputs:
Line 1
Line 2

Executing 'jsfile.js' via a python script that calls 'node jsfile.js'. Now the js file outputs:
Line 1

Expected result: The second run via invoking from python should also print "Line 2".

Tested on Python v2.7.8 64-bit and Node v0.10.28 on Windows 7 64-bit.

@juj juj mannequin added the stdlib Python modules in the Lib dir label Jul 25, 2014
@juj
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juj mannequin commented Jul 27, 2014

Further testing suggests that this is not a Python issue, but instead an issue in node.js, reported already earlier here nodejs/node-v0.x-archive#1669

Closing this as invalid.

@juj juj mannequin added the invalid label Jul 27, 2014
@ezio-melotti ezio-melotti added the type-bug An unexpected behavior, bug, or error label Jul 27, 2014
@ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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