New submission from Sean B. Palmer:
create.py:
import multiprocessing
manager = multiprocessing.Manager()
namespace = manager.Namespace()
print("create.py complete")
run.py:
import create
print("run.py complete")
Correct behaviour occurs for create.py:
$ python3 create.py
create.py complete
INCORRECT behaviour occurs for run.py:
$ python3 run.py
No output, because it hangs. On SIGINT:
^CTraceback (most recent call last):
File "run.py", line 1, in <module>
import create
File "[...]/create.py", line 7, in <module>
test()
File "[...]/create.py", line 5, in test
namespace = manager.Namespace()
File
"/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/multiprocessing/managers.py",
line 670, in temp
token, exp = self._create(typeid, *args, **kwds)
File
"/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/multiprocessing/managers.py",
line 568, in _create
conn = self._Client(self._address, authkey=self._authkey)
File
"/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/multiprocessing/connection.py",
line 175, in Client
answer_challenge(c, authkey)
File
"/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/multiprocessing/connection.py",
line 412, in answer_challenge
message = connection.recv_bytes(256) # reject large message
KeyboardInterrupt
$ python3
Python 3.2.3 (v3.2.3:3d0686d90f55, Apr 10 2012, 11:25:50)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
This appears to be a duplicate of this *closed* bug:
http://bugs.python.org/issue7474
This was closed because nobody could reproduce the behaviour on Python 3. I
have reproduced it, but I don't know how to reopen that bug, so I'm filing this
one. The test case in 7474 also fails for me.
----------
messages: 170240
nosy: palmer
priority: normal
severity: normal
status: open
title: multiprocessing.SyncManager connection hang
type: crash
versions: Python 3.2
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue15914>
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