New submission from Lev Veshnyakov:
It's only in imap, in map it's ok. The following code explains the issue:
from multiprocessing.pool import ThreadPool
pool = ThreadPool(10)
def gen():
yield 1 + '1' # here is an error
try:
next((pool.imap(str, gen(
e
Lev Veshnyakov added the comment:
Ubuntu 14.04 LTS, 3.13.0-83-generic, x86_64
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<http://bugs.python.org/issue28696>
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Lev Veshnyakov added the comment:
So, I've checked twice, it's presented by me on python 3.4.3, and not by 3.5.2.
So I will go deaper
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Lev Veshnyakov added the comment:
I've reproduced it on 2 different machines:
- on a MacBook in Docker (debian:jessie, python 3.4.2)
- on another desktop (Ubuntu 14.04.1, 3.16.0-77-generic, x86_64, python 3.4.3)
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Lev Veshnyakov added the comment:
It's hanging in a while loop in _handle_workers,
/usr/lib/python3.4/multiprocessingpool.py:365.
I can't figure out what is the reason.
@staticmethod
def _handle_workers(pool):
thread = threading.current_thread()
# Keep maintaining workers
Lev Veshnyakov added the comment:
Yes, I'm free to move to 3.5, now I'm seeing isn't there any problems in 3.5
according to this issue.
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Python tracker
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New submission from Lev Veshnyakov:
Consider the following code:
from multiprocessing.pool import ThreadPool
pool = ThreadPool(10)
def gen():
yield 1 + '1' # here is an error
print(list(pool.imap(str, gen( # prints []
print(list(pool.map(str, gen( # raises Type
Changes by Lev Veshnyakov :
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nosy: +davin
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Python tracker
<http://bugs.python.org/issue28699>
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