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Batch and async training do not work with macOS/Windows and Python >= 3.8 #123

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marioyc opened this issue Jan 20, 2021 · 2 comments
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Batch and async training do not work with macOS/Windows and Python >= 3.8 #123

marioyc opened this issue Jan 20, 2021 · 2 comments
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@marioyc
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marioyc commented Jan 20, 2021

In Python 3.8 the default mode of multiprocessing for macOS was changed

For reference: chainer/chainerrl#572
@marioyc marioyc self-assigned this Jan 20, 2021
@elbamos
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elbamos commented Nov 14, 2021

I was able to workaround this by calling mp.set_start_method('fork') before main() in the example scripts.

@shreyassr123 shreyassr123 mentioned this issue May 22, 2024
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shreyassr123 commented May 22, 2024 •
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I am not able to run train_dqn_batch_ale.py. Further, mp.set_start_method('fork') is also not working for me. I am getting the following error :
AttributeError: Can't pickle local object 'main..make_env'

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