[issue15702] Multiprocessing Pool deadlocks on join after empty map operation

2012-08-17 Thread Richard Oudkerk 

Changes by Richard Oudkerk shibt...@gmail.com:


--
resolution:  - duplicate
stage:  - committed/rejected
status: open - closed

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[issue15702] Multiprocessing Pool deadlocks on join after empty map operation

2012-08-16 Thread James Hutchison 

New submission from James Hutchison:

Following code deadlocks on Windows 7 64-bit, Python 3.2.3

If you have a pool issue a map operation over an empty iterable then try to 
join later, it will deadlock. If there is no map operation or blah in the code 
below isn't empty, it does not deadlock

from multiprocessing import Pool

def main():
p = Pool();
blah = [];
print(Mapping);
p.map(dummy, blah);
p.close();
p.join(); # deadlocks here
print(Done);

def dummy(x):
pass;

if __name__ == __main__:
main();

--
components: Library (Lib)
messages: 168408
nosy: Jimbofbx
priority: normal
severity: normal
status: open
title: Multiprocessing Pool deadlocks on join after empty map operation
type: behavior
versions: Python 3.2

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[issue15702] Multiprocessing Pool deadlocks on join after empty map operation

2012-08-16 Thread Antoine Pitrou 

Changes by Antoine Pitrou pit...@free.fr:


--
nosy: +sbt

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[issue15702] Multiprocessing Pool deadlocks on join after empty map operation

2012-08-16 Thread Jeff Knupp 

Jeff Knupp added the comment:

This is a duplicate of http://bugs.python.org/issue12157, which was fixed.

--
nosy: +Jeff.Knupp

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