EOFError: Ran out of input with num_workers>0 in windows

[sgulasekaran]

Seems there is related issue https://discuss.pytorch.org/t/pytorch-windows-eoferror-ran-out-of-input-when-num-workers-0/25918/18. But I can't get workaround so far.

python trainer.py -c config/config.yaml -n firstrun
2020-04-16 06:20:54,376 - INFO - Starting new training run.
Validation loop: 0%| | 0/1283 [00:00<?, ?it/s]2
020-04-16 06:20:54,386 - INFO - Exiting due to exception: 'getstate'
Traceback (most recent call last):
File "C:\Users\susinder\PycharmProjects\melgan_seungwonpark\utils\train.py", line 60, in train
validate(hp, args, model_g, model_d, valloader, writer, step)
File "C:\Users\susinder\PycharmProjects\melgan_seungwonpark\utils\validation.py", line 13, in validate
for mel, audio in loader:
File "C:\Users\susinder\Anaconda3\envs\test\lib\site-packages\tqdm\std.py", line 1119, in iter
for obj in iterable:
File "C:\Users\susinder\Anaconda3\envs\test\lib\site-packages\torch\utils\data\dataloader.py", line 279, in iter
return _MultiProcessingDataLoaderIter(self)
File "C:\Users\susinder\Anaconda3\envs\test\lib\site-packages\torch\utils\data\dataloader.py", line 719, in init
w.start()
File "C:\Users\susinder\Anaconda3\envs\test\lib\multiprocessing\process.py", line 112, in start
self._popen = self._Popen(self)
File "C:\Users\susinder\Anaconda3\envs\test\lib\multiprocessing\context.py", line 223, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "C:\Users\susinder\Anaconda3\envs\test\lib\multiprocessing\context.py", line 322, in _Popen
return Popen(process_obj)
File "C:\Users\susinder\Anaconda3\envs\test\lib\multiprocessing\popen_spawn_win32.py", line 89, in init
reduction.dump(process_obj, to_child)
File "C:\Users\susinder\Anaconda3\envs\test\lib\multiprocessing\reduction.py", line 60, in dump

                                                                          File "C:\Users\susinder\Anaconda3\envs\test\lib\multiprocessing\reduction.py", line 60, in dump

Validation loop: 0%| | 0/1283 [00:00<?, ?it/s]

(test) C:\Users\susinder\PycharmProjects\melgan_seungwonpark>Traceback (most recent call last):
File "", line 1, in
File "C:\Users\susinder\Anaconda3\envs\test\lib\multiprocessing\spawn.py", line 105, in spawn_main
exitcode = _main(fd)
File "C:\Users\susinder\Anaconda3\envs\test\lib\multiprocessing\spawn.py", line 115, in _main
self = reduction.pickle.load(from_parent)
EOFError: Ran out of input