Traceback (most recent call last): File "main.py", line 257, in <module> main(args) File "main.py", line 251, in main estimator.train(input_fn=partial(input_fn, global_step=current_step, eval=False), max_steps=params["train_steps"]) File "/home/nikhilnayak/.local/lib/python3.8/site-packages/tensorflow_estimator/python/estimator/tpu/tpu_estimator.py", line 3110, in train rendezvous.raise_errors() File "/home/nikhilnayak/.local/lib/python3.8/site-packages/tensorflow_estimator/python/estimator/tpu/error_handling.py", line 150, in raise_errors six.reraise(typ, value, traceback) File "/home/nikhilnayak/.local/lib/python3.8/site-packages/six.py", line 703, in reraise raise value File "/home/nikhilnayak/.local/lib/python3.8/site-packages/tensorflow_estimator/python/estimator/tpu/tpu_estimator.py", line 3100, in train return super(TPUEstimator, self).train( File "/home/nikhilnayak/.local/lib/python3.8/site-packages/tensorflow_estimator/python/estimator/estimator.py", line 346, in train hooks.extend(self._convert_train_steps_to_hooks(steps, max_steps)) File "/home/nikhilnayak/.local/lib/python3.8/site-packages/tensorflow_estimator/python/estimator/tpu/tpu_estimator.py", line 2973, in _convert_train_steps_to_hooks if ctx.is_running_on_cpu(): File "/home/nikhilnayak/.local/lib/python3.8/site-packages/tensorflow_estimator/python/estimator/tpu/tpu_context.py", line 531, in is_running_on_cpu self._validate_tpu_configuration() File "/home/nikhilnayak/.local/lib/python3.8/site-packages/tensorflow_estimator/python/estimator/tpu/tpu_context.py", line 699, in _validate_tpu_configuration num_cores = self.num_cores File "/home/nikhilnayak/.local/lib/python3.8/site-packages/tensorflow_estimator/python/estimator/tpu/tpu_context.py", line 429, in num_cores metadata = self._get_tpu_system_metadata() File "/home/nikhilnayak/.local/lib/python3.8/site-packages/tensorflow_estimator/python/estimator/tpu/tpu_context.py", line 333, in _get_tpu_system_metadata tpu_system_metadata_lib._query_tpu_system_metadata( File "/home/nikhilnayak/.local/lib/python3.8/site-packages/tensorflow/python/tpu/tpu_system_metadata.py", line 135, in _query_tpu_system_metadata raise RuntimeError( RuntimeError: Cannot find any TPU cores in the system (master address ). This usually means the master address is incorrect or the TPU worker has some problems. Available devices: [_DeviceAttributes(/job:localhost/replica:0/task:0/device:CPU:0, CPU, 268435456, -3188567715276368833)]