TAO 5.3 docker error - Not supported URL scheme http+docker (requests 2.31.0)

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• Hardware - L4
• Network Type - TAO classification_pyt / fan_small_12_p4_hybrid

I’m working through the classification_pyt notebook and am stuck with an error.

The notebook cell is:

print("Train Classification Model")
!tao model classification_pyt train \
                  -e $SPECS_DIR/train_cats_dogs.yaml \
                  -r $RESULTS_DIR/classification_experiment \
                  -g $NUM_GPUS \
                  model.init_cfg.checkpoint=/workspace/tao-experiments/pretrained_fan_hybrid_small/pretrained_fan_classification_imagenet_vfan_hybrid_small/fan_hybrid_small.pth \
                  train.train_config.runner.max_epochs=$EPOCHS

It’s failing with:

2024-07-09 21:29:23,283 [TAO Toolkit] [INFO] root 160: Registry: ['nvcr.io']
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/requests/adapters.py", line 633, in send
    conn = self.get_connection_with_tls_context(
  File "/usr/local/lib/python3.10/dist-packages/requests/adapters.py", line 489, in get_connection_with_tls_context
    conn = self.poolmanager.connection_from_host(
  File "/usr/local/lib/python3.10/dist-packages/urllib3/poolmanager.py", line 246, in connection_from_host
    return self.connection_from_context(request_context)
  File "/usr/local/lib/python3.10/dist-packages/urllib3/poolmanager.py", line 258, in connection_from_context
    raise URLSchemeUnknown(scheme)
urllib3.exceptions.URLSchemeUnknown: Not supported URL scheme http+docker

This is reproducible in the shell with:

tao model classification_pyt run /bin/bash

I’m searched the forums and would add the following:

• I’m running requests-2.31.0 (see here)

pip show requests
Name: requests
Version: 2.31.0
Summary: Python HTTP for Humans.
Home-page: https://requests.readthedocs.io
Author: Kenneth Reitz
Author-email: me@kennethreitz.org
License: Apache 2.0
Location: /home/****/miniconda3/envs/tao-launcher/lib/python3.7/site-packages
Requires: certifi, charset-normalizer, idna, urllib3
Required-by: wandb

• Docker is being run as a user, not root

Output of tao info:

$ tao info
Configuration of the TAO Toolkit Instance
task_group: ['model', 'dataset', 'deploy']
format_version: 3.0
toolkit_version: 5.3.0
published_date: 03/14/2024

Full exception output:

2024-07-09 21:47:44,850 [TAO Toolkit] [INFO] root 160: Registry: ['nvcr.io']
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/requests/adapters.py", line 633, in send
    conn = self.get_connection_with_tls_context(
  File "/usr/local/lib/python3.10/dist-packages/requests/adapters.py", line 489, in get_connection_with_tls_context
    conn = self.poolmanager.connection_from_host(
  File "/usr/local/lib/python3.10/dist-packages/urllib3/poolmanager.py", line 246, in connection_from_host
    return self.connection_from_context(request_context)
  File "/usr/local/lib/python3.10/dist-packages/urllib3/poolmanager.py", line 258, in connection_from_context
    raise URLSchemeUnknown(scheme)
urllib3.exceptions.URLSchemeUnknown: Not supported URL scheme http+docker

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/docker/api/client.py", line 205, in _retrieve_server_version
    return self.version(api_version=False)["ApiVersion"]
  File "/usr/local/lib/python3.10/dist-packages/docker/api/daemon.py", line 181, in version
    return self._result(self._get(url), json=True)
  File "/usr/local/lib/python3.10/dist-packages/docker/utils/decorators.py", line 46, in inner
    return f(self, *args, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/docker/api/client.py", line 228, in _get
    return self.get(url, **self._set_request_timeout(kwargs))
  File "/usr/local/lib/python3.10/dist-packages/requests/sessions.py", line 602, in get
    return self.request("GET", url, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/requests/sessions.py", line 589, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python3.10/dist-packages/requests/sessions.py", line 703, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/requests/adapters.py", line 637, in send
    raise InvalidURL(e, request=request)
requests.exceptions.InvalidURL: Not supported URL scheme http+docker

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/tao", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.10/dist-packages/nvidia_tao_cli/entrypoint/tao_launcher.py", line 134, in main
    instance.launch_command(
  File "/usr/local/lib/python3.10/dist-packages/nvidia_tao_cli/components/instance_handler/local_instance.py", line 357, in launch_command
    docker_handler = self.handler_map[
  File "/usr/local/lib/python3.10/dist-packages/nvidia_tao_cli/components/instance_handler/local_instance.py", line 203, in handler_map
    handler_map[handler_key] = DockerHandler(
  File "/usr/local/lib/python3.10/dist-packages/nvidia_tao_cli/components/docker_handler/docker_handler.py", line 92, in __init__
    self._docker_client = docker.from_env()
  File "/usr/local/lib/python3.10/dist-packages/docker/client.py", line 84, in from_env
    return cls(
  File "/usr/local/lib/python3.10/dist-packages/docker/client.py", line 40, in __init__
    self.api = APIClient(*args, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/docker/api/client.py", line 188, in __init__
    self._version = self._retrieve_server_version()
  File "/usr/local/lib/python3.10/dist-packages/docker/api/client.py", line 212, in _retrieve_server_version
    raise DockerException(
docker.errors.DockerException: Error while fetching server API version: Not supported URL scheme http+docker

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