New submission from Tomer:
Hi,
In multiprocessing.dummy module I noticed when you send a zero-length iterator
to pool.map it hang forever,
Code example:
import urllib2
from multiprocessing.dummy import Pool as ThreadPool
def start_multithreading_urlopen(threads_num):
pool = ThreadPool(threads_num)
results = pool.map(urllib2.urlopen, [])
pool.close()
pool.join()
# hang here
print results
I think it related to Issue6433 that was fixed on multiprocessing module with
simple length check
----------
components: Library (Lib)
messages: 254844
nosy: tomer70
priority: normal
severity: normal
status: open
title: multiprocessing.dummy: pool.map hangs on empty list
type: behavior
versions: Python 2.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue25656>
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