Error When Running Visualize a Few Images in Transfer Learning Tutorial
Closed this issue · 0 comments
Bhargavaa1 commented
Hey Mike,
I am running into this runtime error when running the "Visualize a Few Images" section in the Transfer Learning Tutorial. I believe it has to do with the DataLoader class and multiprocessing so I am currently looking into that. Any help with this error would be greatly appreciated.
Thanks,
Adi
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 116, in spawn_main
exitcode = _main(fd, parent_sentinel)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 125, in _main
prepare(preparation_data)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 236, in prepare
_fixup_main_from_path(data['init_main_from_path'])
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 287, in _fixup_main_from_path
main_content = runpy.run_path(main_path,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/runpy.py", line 269, in run_path
return _run_module_code(code, init_globals, run_name,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/runpy.py", line 96, in _run_module_code
_run_code(code, mod_globals, init_globals,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/runpy.py", line 86, in _run_code
exec(code, run_globals)
File "/Users/Bhargavaa/Desktop/MATH 166/07_applications_TransferLearning/transferLearningTutorial.py", line 59, in <module>
inputs, classes = next(iter(dataloaders['train']))
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 435, in __iter__
return self._get_iterator()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 381, in _get_iterator
return _MultiProcessingDataLoaderIter(self)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 1034, in __init__
w.start()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/process.py", line 121, in start
self._popen = self._Popen(self)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/context.py", line 224, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/context.py", line 284, in _Popen
return Popen(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 32, in __init__
super().__init__(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/popen_fork.py", line 19, in __init__
self._launch(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 42, in _launch
prep_data = spawn.get_preparation_data(process_obj._name)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 154, in get_preparation_data
_check_not_importing_main()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 134, in _check_not_importing_main
raise RuntimeError('''
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.
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 116, in spawn_main
exitcode = _main(fd, parent_sentinel)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 125, in _main
prepare(preparation_data)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 236, in prepare
_fixup_main_from_path(data['init_main_from_path'])
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 287, in _fixup_main_from_path
main_content = runpy.run_path(main_path,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/runpy.py", line 269, in run_path
return _run_module_code(code, init_globals, run_name,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/runpy.py", line 96, in _run_module_code
_run_code(code, mod_globals, init_globals,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/runpy.py", line 86, in _run_code
exec(code, run_globals)
File "/Users/Bhargavaa/Desktop/MATH 166/07_applications_TransferLearning/transferLearningTutorial.py", line 59, in <module>
inputs, classes = next(iter(dataloaders['train']))
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 435, in __iter__
return self._get_iterator()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 381, in _get_iterator
return _MultiProcessingDataLoaderIter(self)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 1034, in __init__
w.start()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/process.py", line 121, in start
self._popen = self._Popen(self)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/context.py", line 224, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/context.py", line 284, in _Popen
return Popen(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 32, in __init__
super().__init__(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/popen_fork.py", line 19, in __init__
self._launch(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 42, in _launch
prep_data = spawn.get_preparation_data(process_obj._name)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 154, in get_preparation_data
_check_not_importing_main()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 134, in _check_not_importing_main
raise RuntimeError('''
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.
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 116, in spawn_main
exitcode = _main(fd, parent_sentinel)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 125, in _main
prepare(preparation_data)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 236, in prepare
_fixup_main_from_path(data['init_main_from_path'])
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 287, in _fixup_main_from_path
main_content = runpy.run_path(main_path,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/runpy.py", line 269, in run_path
return _run_module_code(code, init_globals, run_name,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/runpy.py", line 96, in _run_module_code
_run_code(code, mod_globals, init_globals,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/runpy.py", line 86, in _run_code
exec(code, run_globals)
File "/Users/Bhargavaa/Desktop/MATH 166/07_applications_TransferLearning/transferLearningTutorial.py", line 59, in <module>
inputs, classes = next(iter(dataloaders['train']))
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 435, in __iter__
return self._get_iterator()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 381, in _get_iterator
return _MultiProcessingDataLoaderIter(self)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 1034, in __init__
w.start()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/process.py", line 121, in start
self._popen = self._Popen(self)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/context.py", line 224, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/context.py", line 284, in _Popen
return Popen(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 32, in __init__
super().__init__(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/popen_fork.py", line 19, in __init__
self._launch(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 42, in _launch
prep_data = spawn.get_preparation_data(process_obj._name)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 154, in get_preparation_data
_check_not_importing_main()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 134, in _check_not_importing_main
raise RuntimeError('''
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.
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 116, in spawn_main
exitcode = _main(fd, parent_sentinel)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 125, in _main
prepare(preparation_data)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 236, in prepare
_fixup_main_from_path(data['init_main_from_path'])
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 287, in _fixup_main_from_path
main_content = runpy.run_path(main_path,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/runpy.py", line 269, in run_path
return _run_module_code(code, init_globals, run_name,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/runpy.py", line 96, in _run_module_code
_run_code(code, mod_globals, init_globals,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/runpy.py", line 86, in _run_code
exec(code, run_globals)
File "/Users/Bhargavaa/Desktop/MATH 166/07_applications_TransferLearning/transferLearningTutorial.py", line 59, in <module>
inputs, classes = next(iter(dataloaders['train']))
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 435, in __iter__
return self._get_iterator()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 381, in _get_iterator
return _MultiProcessingDataLoaderIter(self)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 1034, in __init__
w.start()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/process.py", line 121, in start
self._popen = self._Popen(self)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/context.py", line 224, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/context.py", line 284, in _Popen
return Popen(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 32, in __init__
super().__init__(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/popen_fork.py", line 19, in __init__
self._launch(process_obj)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 42, in _launch
prep_data = spawn.get_preparation_data(process_obj._name)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 154, in get_preparation_data
_check_not_importing_main()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/spawn.py", line 134, in _check_not_importing_main
raise RuntimeError('''
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.
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 1120, in _try_get_data
data = self._data_queue.get(timeout=timeout)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/queues.py", line 113, in get
if not self._poll(timeout):
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/connection.py", line 262, in poll
return self._poll(timeout)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/connection.py", line 429, in _poll
r = wait([self], timeout)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/connection.py", line 936, in wait
ready = selector.select(timeout)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/selectors.py", line 416, in select
fd_event_list = self._selector.poll(timeout)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/_utils/signal_handling.py", line 66, in handler
_error_if_any_worker_fails()
RuntimeError: DataLoader worker (pid 3095) exited unexpectedly with exit code 1. Details are lost due to multiprocessing. Rerunning with num_workers=0 may give better error trace.
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/Users/Bhargavaa/Desktop/MATH 166/07_applications_TransferLearning/transferLearningTutorial.py", line 59, in <module>
inputs, classes = next(iter(dataloaders['train']))
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 628, in __next__
data = self._next_data()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 1316, in _next_data
idx, data = self._get_data()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 1282, in _get_data
success, data = self._try_get_data()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/torch/utils/data/dataloader.py", line 1133, in _try_get_data
raise RuntimeError('DataLoader worker (pid(s) {}) exited unexp
RuntimeError: DataLoader worker (pid(s) 3095) exited unexpectedly