[issue5879] multiprocessing example "pool of http servers " fails on windows

[Terry J. Reedy]

Terry J. Reedy  added the comment:

As I said above, the example was removed from 3.x.  At some point, they were 
all vetted for Windows execution or failure.

Zach, thanks for reviewing 2.7 issues.

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resolution:  -> out of date
stage: needs patch -> resolved
status: open -> closed

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[issue5879] multiprocessing example "pool of http servers " fails on windows

[Zackery Spytz]

Zackery Spytz  added the comment:

Python 2 is EOL.

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[issue5879] multiprocessing example "pool of http servers " fails on windows

[Mark Lawrence]

Change by Mark Lawrence :


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[issue5879] multiprocessing example pool of http servers fails on windows

[Terry J. Reedy]

Terry J. Reedy added the comment:

r50094 was for 2.7 (see msg216242, part of #21204 that is a partly a duplicate 
of this). Running in 2.7.8, the message has changed to
PicklingError: Can't pickle type 'thread.lock': it's not found as 
thread.lock

The example has been removed in 3.x. I think the right 'fix' for 2.7 is to 
remove the reference to Windows in both comment and code and instead say 'Does 
not run on Windows'.

--
assignee: jnoller - 
components: +Documentation -Library (Lib), Windows
keywords: +easy
nosy: +terry.reedy
title: multiprocessing - example pool of http servers  fails on windows 
socket has no attribute fromfd - multiprocessing example pool of http 
servers  fails on windows
versions:  -Python 3.1, Python 3.2

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[issue5879] multiprocessing - example pool of http servers fails on windows socket has no attribute fromfd

[Mark Lawrence]

Mark Lawrence added the comment:

Unfortunately #1378 refers to r59004 which is incorrect.  I can't find (due to 
my limited skill set :( where and when fromfd was included in the Python builds 
for Windows.  If that can be found and if somebody is prepared to do a backport 
then this can go forward.

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[issue5879] multiprocessing - example pool of http servers fails on windows socket has no attribute fromfd

[Ned Deily]

Changes by Ned Deily n...@acm.org:


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[issue5879] multiprocessing - example pool of http servers fails on windows socket has no attribute fromfd

[Mher Movsisyan]

Mher Movsisyan mher.movsis...@gmail.com added the comment:

py3k does support socket.fromfd on Windows (#1378)

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[issue5879] multiprocessing - example pool of http servers fails on windows socket has no attribute fromfd

[Florent Xicluna]

Changes by Florent Xicluna florent.xicl...@gmail.com:


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components: +Windows

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[issue5879] multiprocessing - example pool of http servers fails on windows socket has no attribute fromfd

[Mark Lawrence]

Changes by Mark Lawrence breamore...@yahoo.co.uk:


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versions: +Python 3.2 -Python 2.6, Python 3.0

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[issue5879] multiprocessing - example pool of http servers fails on windows socket has no attribute fromfd

[Gabriel Genellina]

Changes by Gabriel Genellina gagsl-...@yahoo.com.ar:


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[issue5879] multiprocessing - example pool of http servers fails on windows socket has no attribute fromfd

[Jeong-Min Lee]

Changes by Jeong-Min Lee false...@gmail.com:


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[issue5879] multiprocessing - example pool of http servers fails on windows socket has no attribute fromfd

[Jesse Noller]

Changes by Jesse Noller jnol...@gmail.com:


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[issue5879] multiprocessing - example pool of http servers fails on windows socket has no attribute fromfd

[Harald Armin Massa]

New submission from Harald Armin Massa c...@ghum.de:

the example from

http://docs.python.org/library/multiprocessing.html?highlight=multiprocessing#module-multiprocessing

named 
# Example where a pool of http servers share a single listening socket
#
 
does not work on windows.

Reason: 

s = socket.fromfd(fd, family, type_, proto)

in line 156 of reduction.py

fails, because fromfd is not available on windows. Sad thing:
reduction.py was put into processing.py exactly to solve that problem
(i.e. reduction.py is provided as workaround for socket.fromfd not
available on windows, from the documentation: 
if sys.platform == 'win32':
import multiprocessing.reduction
# make sockets pickable/inheritable


the solution within processing was:

try:
fromfd = socket.fromfd
except AttributeError:
def fromfd(fd, family, type, proto=0):
s = socket._socket.socket()
_processing.changeFd(s, fd, family, type, proto)
return s

but: _multiprocessing has no longer a method changeFd.

Harald

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components: Library (Lib)
messages: 86810
nosy: ghum
severity: normal
status: open
title: multiprocessing - example pool of http servers  fails on windows 
socket has no attribute fromfd
versions: Python 2.6

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[issue5879] multiprocessing - example pool of http servers fails on windows socket has no attribute fromfd

[R. David Murray]

Changes by R. David Murray rdmur...@bitdance.com:


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nosy: +jnoller
priority:  - normal
stage:  - needs patch
type:  - behavior
versions: +Python 2.7, Python 3.0, Python 3.1

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