There's some problem in the training process

[FangZuo123]

/usr/lib/python3.7/queue.py in get(self, block, timeout)
169 while not self._qsize():
--> 170 self.not_empty.wait()
171 elif timeout < 0:

/usr/lib/python3.7/threading.py in wait(self, timeout)
295 if timeout is None:
--> 296 waiter.acquire()
297 gotit = True

KeyboardInterrupt:

During handling of the above exception, another exception occurred:

ValueError Traceback (most recent call last)
/content/drive/MyDrive/n2n/train_US.py in ()
131
132 if name == 'main':
--> 133 main()
134

/content/drive/MyDrive/n2n/train_US.py in main()
125 validation_data=val_generator,
126 verbose=1,
--> 127 callbacks=callbacks)
128
129 np.savez(str(output_path.joinpath("history.npz")), history=hist.history)

/tensorflow-1.15.2/python3.7/keras/legacy/interfaces.py in wrapper(*args, **kwargs)
89 warnings.warn('Update your ' + object_name + ' call to the ' +
90 'Keras 2 API: ' + signature, stacklevel=2)
---> 91 return func(*args, **kwargs)
92 wrapper._original_function = func
93 return wrapper

/tensorflow-1.15.2/python3.7/keras/engine/training.py in fit_generator(self, generator, steps_per_epoch, epochs, verbose, callbacks, validation_data, validation_steps, validation_freq, class_weight, max_queue_size, workers, use_multiprocessing, shuffle, initial_epoch)
1730 use_multiprocessing=use_multiprocessing,
1731 shuffle=shuffle,
-> 1732 initial_epoch=initial_epoch)
1733
1734 @interfaces.legacy_generator_methods_support

/tensorflow-1.15.2/python3.7/keras/engine/training_generator.py in fit_generator(model, generator, steps_per_epoch, epochs, verbose, callbacks, validation_data, validation_steps, validation_freq, class_weight, max_queue_size, workers, use_multiprocessing, shuffle, initial_epoch)
183 batch_index = 0
184 while steps_done < steps_per_epoch:
--> 185 generator_output = next(output_generator)
186
187 if not hasattr(generator_output, 'len'):

/tensorflow-1.15.2/python3.7/keras/utils/data_utils.py in get(self)
623 except Exception:
624 self.stop()
--> 625 six.reraise(*sys.exc_info())
626
627

/usr/local/lib/python3.7/dist-packages/six.py in reraise(tp, value, tb)
701 if value.traceback is not tb:
702 raise value.with_traceback(tb)
--> 703 raise value
704 finally:
705 value = None

/tensorflow-1.15.2/python3.7/keras/utils/data_utils.py in get(self)
617 inputs = self.sequence[idx]
618 finally:
--> 619 self.queue.task_done()
620
621 if inputs is not None:

/usr/lib/python3.7/queue.py in task_done(self)
72 if unfinished <= 0:
73 if unfinished < 0:
---> 74 raise ValueError('task_done() called too many times')
75 self.all_tasks_done.notify_all()
76 self.unfinished_tasks = unfinished

ValueError: task_done() called too many times/usr/lib/python3.7/queue.py in get(self, block, timeout)
169 while not self._qsize():
--> 170 self.not_empty.wait()
171 elif timeout < 0:

/usr/lib/python3.7/threading.py in wait(self, timeout)
295 if timeout is None:
--> 296 waiter.acquire()
297 gotit = True

KeyboardInterrupt:

During handling of the above exception, another exception occurred:

ValueError Traceback (most recent call last)
/content/drive/MyDrive/n2n/train_US.py in ()
131
132 if name == 'main':
--> 133 main()
134

/content/drive/MyDrive/n2n/train_US.py in main()
125 validation_data=val_generator,
126 verbose=1,
--> 127 callbacks=callbacks)
128
129 np.savez(str(output_path.joinpath("history.npz")), history=hist.history)

/tensorflow-1.15.2/python3.7/keras/legacy/interfaces.py in wrapper(*args, **kwargs)
89 warnings.warn('Update your ' + object_name + ' call to the ' +
90 'Keras 2 API: ' + signature, stacklevel=2)
---> 91 return func(*args, **kwargs)
92 wrapper._original_function = func
93 return wrapper

/tensorflow-1.15.2/python3.7/keras/engine/training.py in fit_generator(self, generator, steps_per_epoch, epochs, verbose, callbacks, validation_data, validation_steps, validation_freq, class_weight, max_queue_size, workers, use_multiprocessing, shuffle, initial_epoch)
1730 use_multiprocessing=use_multiprocessing,
1731 shuffle=shuffle,
-> 1732 initial_epoch=initial_epoch)
1733
1734 @interfaces.legacy_generator_methods_support

/tensorflow-1.15.2/python3.7/keras/engine/training_generator.py in fit_generator(model, generator, steps_per_epoch, epochs, verbose, callbacks, validation_data, validation_steps, validation_freq, class_weight, max_queue_size, workers, use_multiprocessing, shuffle, initial_epoch)
183 batch_index = 0
184 while steps_done < steps_per_epoch:
--> 185 generator_output = next(output_generator)
186
187 if not hasattr(generator_output, 'len'):

/tensorflow-1.15.2/python3.7/keras/utils/data_utils.py in get(self)
623 except Exception:
624 self.stop()
--> 625 six.reraise(*sys.exc_info())
626
627

/usr/local/lib/python3.7/dist-packages/six.py in reraise(tp, value, tb)
701 if value.traceback is not tb:
702 raise value.with_traceback(tb)
--> 703 raise value
704 finally:
705 value = None

/tensorflow-1.15.2/python3.7/keras/utils/data_utils.py in get(self)
617 inputs = self.sequence[idx]
618 finally:
--> 619 self.queue.task_done()
620
621 if inputs is not None:

/usr/lib/python3.7/queue.py in task_done(self)
72 if unfinished <= 0:
73 if unfinished < 0:
---> 74 raise ValueError('task_done() called too many times')
75 self.all_tasks_done.notify_all()
76 self.unfinished_tasks = unfinished

ValueError: task_done() called too many times