FAQ

FAQ and Issues

1

Got exception while downloading checkpoint An error occurred (404) when calling the HeadObject operation: Not Found when starting sagemaker

This is might be caused by the sagemaker container looking for a pretrained model, you need to comment out the two hyperparameters inside rl_deepracer_coach_robomaker.py to stop it looking for a pretrained model. See Issue #2 for more info

2

Running sagemaker container gives the error no module named 'rospy'

You will need to copy the config.yaml file to ~/.sagemaker to configure where the temp directories for the sagemaker docker containers are put.

You either need edit ~/.sagemaker/config.yaml to point to a directory that exists, or create ../../robo/container. It is relative to where you run rl_deepracer_coach_robomaker.py from. The defautl is set to a folder a couple directories up.

3

Running as sudo python causes errors.

You can try using sudo -E to pass environment variables through to the command.

4

Robomaker seems stuck

There have been manually entered IPs in the robomaker.env file for the crr0004/deepracer_robomaker container. I set the IP it to http://172.18.0.1:9000 but if you start minio before the containers are started for the first time, that IP won't connect properly.