RuntimeError: 训练后没有新的检查点。评估状态: 缺少检查点

Steps to reproduce:

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Error logs:

Traceback (most recent call last): File "/opt/conda/envs/NeuralStack/bin/t2t-trainer", line 35, in tf.app.run(main) File "/opt/conda/envs/NeuralStack/lib/python3.7/site-packages/tensorflow_core/Python/platform/app.py", line 40, in run _run(main=main, argv=argv, flags_parser=_parse_flags_tolerate_undef) File "/opt/conda/envs/NeuralStack/lib/python3.7/site-packages/absl/app.py", line 308, in run _run_main(main, args) File "/opt/conda/envs/NeuralStack/lib/python3.7/site-packages/absl/app.py", line 254, in _run_main sys.exit(main(argv)) File "/opt/conda/envs/NeuralStack/lib/python3.7/site-packages/snoop/tracer.py", line 173, in simple_wrapper return function(*args, **kwargs) File "/opt/conda/envs/NeuralStack/bin/t2t-trainer", line 30, in main t2t_trainer.main(argv) File "/opt/conda/envs/NeuralStack/lib/python3.7/site-packages/tensor2tensor/bin/t2t_trainer.py", line 418, in main execute_schedule(exp) File "/opt/conda/envs/NeuralStack/lib/python3.7/site-packages/tensor2tensor/bin/t2t_trainer.py", line 371, in execute_schedule getattr(exp, FLAGS.schedule)() File "/opt/conda/envs/NeuralStack/lib/python3.7/site-packages/tensor2tensor/utils/trainer_lib.py", line 468, in continuous_train_and_eval self._eval_spec) File "/opt/conda/envs/NeuralStack/lib/python3.7/site-packages/tensorflow_estimator/Python/estimator/training.py", line 473, in train_and_evaluate return executor.run() File "/opt/conda/envs/NeuralStack/lib/python3.7/site-packages/tensorflow_estimator/Python/estimator/training.py", line 613, in run return self.run_local() File "/opt/conda/envs/NeuralStack/lib/python3.7/site-packages/tensorflow_estimator/Python/estimator/training.py", line 714, in run_local saving_listeners=saving_listeners) File "/opt/conda/envs/NeuralStack/lib/python3.7/site-packages/tensorflow_estimator/Python/estimator/estimator.py", line 370, in train loss = self._train_model(input_fn, hooks, saving_listeners) File "/opt/conda/envs/NeuralStack/lib/python3.7/site-packages/tensorflow_estimator/Python/estimator/estimator.py", line 1161, in _train_model return