New submission from Giampaolo Rodola' <[email protected]>:
import multiprocessing
import multiprocessing.managers
def f(n):
return n * n
def worker(pool):
with pool:
pool.apply_async(f, (10, ))
manager = multiprocessing.managers.SyncManager()
manager.start()
pool = manager.Pool(processes=4)
proc = multiprocessing.Process(target=worker, args=(pool, ))
proc.start()
proc.join()
This is related to BPO-35917 and it fails with:
Process Process-2:
Traceback (most recent call last):
File "/home/giampaolo/cpython/Lib/multiprocessing/process.py", line 302, in
_bootstrap
self.run()
File "/home/giampaolo/cpython/Lib/multiprocessing/process.py", line 99, in run
self._target(*self._args, **self._kwargs)
File "foo.py", line 54, in worker
pool.apply_async(f, (10, ))
File "<string>", line 2, in apply_async
File "/home/giampaolo/cpython/Lib/multiprocessing/managers.py", line 802, in
_callmethod
proxytype = self._manager._registry[token.typeid][-1]
AttributeError: 'NoneType' object has no attribute '_registry'
----------
messages: 334962
nosy: davin, giampaolo.rodola, pitrou
priority: normal
severity: normal
status: open
title: multiprocessing: shared manager Pool fails with AttributeError
_______________________________________
Python tracker <[email protected]>
<https://bugs.python.org/issue35919>
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