Issue 30301: multiprocessing: AttributeError: 'SimpleQueue' object has no attribute '_poll' (original) (raw)
This issue has been migrated to GitHub: https://github.com/python/cpython/issues/74487
classification
| Title: | multiprocessing: AttributeError: 'SimpleQueue' object has no attribute '_poll' | ||
|---|---|---|---|
| Type: | behavior | Stage: | resolved |
| Components: | Library (Lib), Windows | Versions: | Python 3.7, Python 3.6, Python 3.5 |
process
| Status: | closed | Resolution: | fixed |
|---|---|---|---|
| Dependencies: | Superseder: | ||
| Assigned To: | Nosy List: | Daniel Moore, davin, paul.moore, serhiy.storchaka, steve.dower, tim.golden, xiang.zhang, zach.ware | |
| Priority: | normal | Keywords: |
Created on 2017-05-07 19:01 by Daniel Moore, last changed 2022-04-11 14:58 by admin. This issue is now closed.
| Pull Requests | |||
|---|---|---|---|
| URL | Status | Linked | Edit |
| PR 1601 | merged | xiang.zhang,2017-05-16 08:06 | |
| PR 1627 | merged | xiang.zhang,2017-05-17 13:11 | |
| PR 1628 | merged | xiang.zhang,2017-05-17 13:12 |
| Messages (7) | ||
|---|---|---|
| msg293209 - (view) | Author: Daniel Moore (Daniel Moore) | Date: 2017-05-07 19:01 |
| I originally posted this as a question on StackOverflow thinking I was doing something wrong: http://stackoverflow.com/questions/43834494/python-3-6-attributeerror-simplequeue-object-has-no-attribute-poll/43835368#43835368 But I think I found the solution and answered my own question. I'm pretty sure you need to set: self._poll = self._reader.poll in the __setstate__ method in the SimpleQueue class of queues.py from the multiprocessing library. Otherwise, I'd love to know an alternative solution. Thanks! | ||
| msg293753 - (view) | Author: Xiang Zhang (xiang.zhang) *  |
Date: 2017-05-16 07:51 |
| Related commit is bdb1cf1ca56db25b33fb15dd91eef2cc32cd8973. A simple reproduce snippet: import multiprocessing as mp def foo(q): q.put('hello') assert not q.empty() if __name__ == '__main__': mp.set_start_method('spawn') q = mp.SimpleQueue() p = mp.Process(target=foo, args=(q,)) p.start() print(q.get()) p.join() | ||
| msg293774 - (view) | Author: Serhiy Storchaka (serhiy.storchaka) * |
Date: 2017-05-16 16:44 |
| LGTM. But can you convert the reproducer to a test? | ||
| msg293838 - (view) | Author: Xiang Zhang (xiang.zhang) * |
Date: 2017-05-17 04:20 |
| Thanks for your reply Serhiy. Test added. :-) | ||
| msg293850 - (view) | Author: Xiang Zhang (xiang.zhang) * |
Date: 2017-05-17 13:04 |
| New changeset 6f75bc003ab4d5294b0291289ae03f7a8d305f46 by Xiang Zhang in branch 'master': bpo-30301: Fix AttributeError when using SimpleQueue.empty() (#1601) https://github.com/python/cpython/commit/6f75bc003ab4d5294b0291289ae03f7a8d305f46 | ||
| msg293853 - (view) | Author: Xiang Zhang (xiang.zhang) * |
Date: 2017-05-17 14:02 |
| New changeset 9081b36f330964faa4dee3af03228d2ca7c71835 by Xiang Zhang in branch '3.5': bpo-30301: Fix AttributeError when using SimpleQueue.empty() (#1601) (#1627) https://github.com/python/cpython/commit/9081b36f330964faa4dee3af03228d2ca7c71835 | ||
| msg293854 - (view) | Author: Xiang Zhang (xiang.zhang) * |
Date: 2017-05-17 14:03 |
| New changeset 43d4c0329e2348540a3a16ac61b3032f04eefd34 by Xiang Zhang in branch '3.6': bpo-30301: Fix AttributeError when using SimpleQueue.empty() (#1601) (#1628) https://github.com/python/cpython/commit/43d4c0329e2348540a3a16ac61b3032f04eefd34 |
| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:46 | admin | set | github: 74487 |
| 2017-05-17 14:06:16 | xiang.zhang | set | status: open -> closedresolution: fixedstage: patch review -> resolved |
| 2017-05-17 14:03:40 | xiang.zhang | set | messages: + |
| 2017-05-17 14:02:58 | xiang.zhang | set | messages: + |
| 2017-05-17 13:12:02 | xiang.zhang | set | pull_requests: + <pull%5Frequest1719> |
| 2017-05-17 13:11:42 | xiang.zhang | set | pull_requests: + <pull%5Frequest1718> |
| 2017-05-17 13:04:02 | xiang.zhang | set | messages: + |
| 2017-05-17 04:20:46 | xiang.zhang | set | messages: + |
| 2017-05-16 16:44:43 | serhiy.storchaka | set | nosy: + serhiy.storchakamessages: + |
| 2017-05-16 08:06:05 | xiang.zhang | set | pull_requests: + <pull%5Frequest1692> |
| 2017-05-16 07:51:13 | xiang.zhang | set | versions: + Python 3.5, Python 3.7nosy: + xiang.zhangmessages: + type: crash -> behaviorstage: patch review |
| 2017-05-10 23:52:33 | vstinner | set | title: “AttributeError: 'SimpleQueue' object has no attribute '_poll'” -> multiprocessing: AttributeError: 'SimpleQueue' object has no attribute '_poll' |
| 2017-05-09 10:02:10 | xiang.zhang | set | nosy: + davin |
| 2017-05-07 19:01:50 | Daniel Moore | create |