BrokenPipeError

[why228430]

BrokenPipeError：[Errno 32] Broken pipe
when I run the teacher.py by python teacher.py --arch wrn_40_2 --lr 0.05 --gpu-id 0. I miss the error,What can I do to solve this problem？ @xuguodong03

[xuguodong03]

Can you provide the whole error information printed in console?

[why228430]

(base) C:\Users\11619\Desktop\SSKD-master>python teacher.py --arch wrn_40_2 --lr 0.05 --gpu-id 0
Files already downloaded and verified
Files already downloaded and verified
Files already downloaded and verified
Files already downloaded and verified
Traceback (most recent call last):
File "", line 1, in
File "D:\anaconda3\lib\multiprocessing\spawn.py", line 105, in spawn_main
exitcode = _main(fd)
File "D:\anaconda3\lib\multiprocessing\spawn.py", line 114, in _main
prepare(preparation_data)
File "D:\anaconda3\lib\multiprocessing\spawn.py", line 225, in prepare
_fixup_main_from_path(data['init_main_from_path'])
File "D:\anaconda3\lib\multiprocessing\spawn.py", line 277, in _fixup_main_from_path
run_name="mp_main")
File "D:\anaconda3\lib\runpy.py", line 263, in run_path
pkg_name=pkg_name, script_name=fname)
File "D:\anaconda3\lib\runpy.py", line 96, in _run_module_code
mod_name, mod_spec, pkg_name, script_name)
File "D:\anaconda3\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Users\11619\Desktop\SSKD-master\teacher.py", line 78, in
for x, (target, _) in enumerate(train_loader):
File "D:\anaconda3\lib\site-packages\torch\utils\data\dataloader.py", line 279, in iter
Traceback (most recent call last):
File "teacher.py", line 78, in
for x, (target, _) in enumerate(train_loader):
File "D:\anaconda3\lib\site-packages\torch\utils\data\dataloader.py", line 279, in iter
return _MultiProcessingDataLoaderIter(self)
File "D:\anaconda3\lib\site-packages\torch\utils\data\dataloader.py", line 719, in init
return _MultiProcessingDataLoaderIter(self)
File "D:\anaconda3\lib\site-packages\torch\utils\data\dataloader.py", line 719, in init
w.start()
File "D:\anaconda3\lib\multiprocessing\process.py", line 112, in start
w.start()
File "D:\anaconda3\lib\multiprocessing\process.py", line 112, in start
self._popen = self._Popen(self)
File "D:\anaconda3\lib\multiprocessing\context.py", line 223, in _Popen
self._popen = self._Popen(self)
File "D:\anaconda3\lib\multiprocessing\context.py", line 223, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "D:\anaconda3\lib\multiprocessing\context.py", line 322, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "D:\anaconda3\lib\multiprocessing\context.py", line 322, in _Popen
return Popen(process_obj)
return Popen(process_obj) File "D:\anaconda3\lib\multiprocessing\popen_spawn_win32.py", line 89, in init

File "D:\anaconda3\lib\multiprocessing\popen_spawn_win32.py", line 46, in init
reduction.dump(process_obj, to_child)
File "D:\anaconda3\lib\multiprocessing\reduction.py", line 60, in dump
prep_data = spawn.get_preparation_data(process_obj._name)
File "D:\anaconda3\lib\multiprocessing\spawn.py", line 143, in get_preparation_data
_check_not_importing_main()
File "D:\anaconda3\lib\multiprocessing\spawn.py", line 136, in _check_not_importing_main
is not going to be frozen to produce an executable.''')
RuntimeError:
An attempt has been made to start a new process before the
current process has finished its bootstrapping phase.

    This probably means that you are not using fork to start your
    child processes and you have forgotten to use the proper idiom
    in the main module:

        if __name__ == '__main__':
            freeze_support()
            ...

    The "freeze_support()" line can be omitted if the program
    is not going to be frozen to produce an executable.
ForkingPickler(file, protocol).dump(obj)

BrokenPipeError: [Errno 32] Broken pipe

[xuguodong03]

I notice that you are using Windows platform.The error is related to the multithreading of Dataloader on Windows. For more details, see this issue. You could try setting num_workers=0. But this will slow down the speed of data loading. I recommend to run the code on Ubuntu platform.

[why228430]

Thanks for you reply. My problem is solved. I will accept your recommend to run the code on Ubuntu platform.