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Created on 2011-06-08 13:55 by jorgsk, last changed 2022-04-11 14:57 by admin. This issue is now closed.
| Files | ||||
|---|---|---|---|---|
| File name | Uploaded | Description | Edit | |
| multitest_pool.py | jorgsk, 2011-06-08 13:55 | |||
| multiprocessing_pool.patch | vstinner, 2011-06-09 00:35 | review | ||
| Messages (6) | |||
|---|---|---|---|
| msg137908 - (view) | Author: Jorgen Skancke (jorgsk) | Date: 2011-06-08 13:55 | |
A normal way to start a multiprocessing-pool is like this: Multiprocessing.Pool(processes=some_number). However, if 'some_number' is 0 or negative, Python hangs and must be killed. I would expect an error message of the type: "Number of processes must be at least 1". Attaching a script that reproduces this. I struggled a bit with this for a program that uses cpu_count() - 4 to calculate 'some_number'. Guess what happens when the number of cores is 4 :) Even though the fix is easy (if some_number < 1), it would be nice to be warned about it. |
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| msg137933 - (view) | Author: STINNER Victor (vstinner) *  |
Date: 2011-06-09 00:35 | |
multiprocessing_pool.patch: raise a ValueError if processes is less than 1. A test should be added. |
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| msg138735 - (view) | Author: Roundup Robot (python-dev)  |
Date: 2011-06-20 15:55 | |
New changeset 1f171dd21bdb by Victor Stinner in branch '3.2': Issue #12285: multiprocessing.Pool() raises a ValueError if the number of http://hg.python.org/cpython/rev/1f171dd21bdb New changeset 1861683793d9 by Victor Stinner in branch 'default': (merge 3.2) Issue #12285: multiprocessing.Pool() raises a ValueError if the http://hg.python.org/cpython/rev/1861683793d9 New changeset 815263546757 by Victor Stinner in branch '2.7': Issue #12285: multiprocessing.Pool() raises a ValueError if the number of http://hg.python.org/cpython/rev/815263546757 |
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| msg274192 - (view) | Author: Roundup Robot (python-dev) |
Date: 2016-09-02 01:17 | |
New changeset 941346104718 by Jason R. Coombs in branch '3.4': Issue #12285: Add test capturing failure. https://hg.python.org/cpython/rev/941346104718 New changeset 56c60b3d06fb by Jason R. Coombs in branch '3.4': Issue #12285: Replace implementation of findall with implementation from Setuptools 7ce820d524db. https://hg.python.org/cpython/rev/56c60b3d06fb New changeset 13619a3e0737 by Jason R. Coombs in branch '3.4': Issue #12285: Update NEWS https://hg.python.org/cpython/rev/13619a3e0737 New changeset ade53661607a by Jason R. Coombs in branch '3.5': Issue #12285: Merge with 3.4 https://hg.python.org/cpython/rev/ade53661607a |
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| msg274194 - (view) | Author: Martin Panter (martin.panter) * |
Date: 2016-09-02 02:03 | |
Looks like that last lot was meant to reference Issue 12885 |
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| msg274198 - (view) | Author: Jason R. Coombs (jaraco) * |
Date: 2016-09-02 02:20 | |
Yep. Sorry for the misfile. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:57:18 | admin | set | github: 56494 |
| 2016-09-02 02:20:26 | jaraco | set | nosy:
+ jaraco messages: + msg274198 |
| 2016-09-02 02:03:33 | martin.panter | set | nosy:
+ martin.panter messages: + msg274194 |
| 2016-09-02 01:17:09 | python-dev | set | messages: + msg274192 |
| 2011-06-20 15:56:45 | vstinner | set | status: open -> closed resolution: fixed |
| 2011-06-20 15:55:42 | python-dev | set | nosy:
+ python-dev messages: + msg138735 |
| 2011-06-09 00:35:44 | vstinner | set | files:
+ multiprocessing_pool.patch versions: + Python 2.7, Python 3.2, Python 3.3, - Python 2.6 nosy: + vstinner messages: + msg137933 keywords: + patch |
| 2011-06-08 13:55:28 | jorgsk | create | |