Message360872
The following code is expected to fail:
import multiprocessing
def f(x):
return x
if __name__ == '__main__':
with multiprocessing.Pool(2, maxtasksperchild=0) as pool:
pool.map(f, range(3))
since it uses a wrong value of the 'maxtasksperchild' parameter. I expect it to raise a ValueError but instead it starts to fill the stderr with practically endless traceback:
Process ForkPoolWorker-2:
Process ForkPoolWorker-1:
Traceback (most recent call last):
File "/usr/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap
self.run()
File "/usr/lib/python3.6/multiprocessing/process.py", line 93, in run
self._target(*self._args, **self._kwargs)
File "/usr/lib/python3.6/multiprocessing/pool.py", line 95, in worker
assert maxtasks is None or (type(maxtasks) == int and maxtasks > 0)
Traceback (most recent call last):
AssertionError
File "/usr/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap
self.run()
File "/usr/lib/python3.6/multiprocessing/process.py", line 93, in run
self._target(*self._args, **self._kwargs)
File "/usr/lib/python3.6/multiprocessing/pool.py", line 95, in worker
assert maxtasks is None or (type(maxtasks) == int and maxtasks > 0)
AssertionError
Process ForkPoolWorker-4:
Process ForkPoolWorker-3:
...
I don't think this is expected behavior.
Tested with Python 3.6.9 on Ubuntu 18.04.3. |
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Date |
User |
Action |
Args |
2020-01-28 13:04:56 | jeyekomon | set | recipients:
+ jeyekomon |
2020-01-28 13:04:56 | jeyekomon | set | messageid: <1580216696.5.0.546840504905.issue39477@roundup.psfhosted.org> |
2020-01-28 13:04:56 | jeyekomon | link | issue39477 messages |
2020-01-28 13:04:56 | jeyekomon | create | |
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