Traceback (most recent call last):


 "/home/developer/celery/celery/app/trace.py", line 411, in trace_task

R = retval = fun(*args, **kwargs)


 "/home/developer/celery/celery/app/trace.py", line 680, in __protected_call__

return self.run(*args, **kwargs)


 "/home/developer/celery/tasks.py", line 13, in fail

raise ValueError("this is from fail!")
ValueError: this is from fail!

Traceback (most recent call last):


 "../libs/object_detection/train.py", line 202, in <module>

tf.app.run()


 "py3-tensorflow/lib/python3.4/site-packages/tensorflow/python/platform/app.py", line 48, in run

_sys.exit(main(_sys.argv[:1] + flags_passthrough))


 "libs/object_detection/train.py", line 198, in main

worker_job_name, is_chief, FLAGS.train_dir)


 "detection-workspace/libs/object_detection/trainer.py", line 192, in train

clones = model_deploy.create_clones(deploy_config, model_fn, [input_queue])


 "detection-workspace/libs/slim/deployment/model_deploy.py", line 193, in create_clones

outputs = model_fn(*args, **kwargs)


 "detection-workspace/libs/object_detection/trainer.py", line 133, in _create_losses

losses_dict = detection_model.loss(prediction_dict)


 "detection-workspace/libs/object_detection/meta_architectures/ssd_meta_arch.py", line 428, in loss

location_losses, cls_losses, prediction_dict, match_list)


 "detection-workspace/libs/object_detection/meta_architectures/ssd_meta_arch.py", line 563, in _apply_hard_mining

match_list=match_list)


 "libs/object_detection/core/losses.py", line 529, in __call__

location_losses = tf.unstack(location_losses)


 "py3-tensorflow/lib/python3.4/site-packages/tensorflow/python/ops/array_ops.py", line 971, in unstack

(axis, -value_shape.ndims, value_shape.ndims))
ValueError: axis = 0 not in [0, 0)
