NameError: name 'NpipeHTTPAdapter' is not defined

Getting this when running ‘aws sam local start-api’

doesnt look like docker issues

pip 19.3.1 aws-sam-cli 0.22.0

Telemetry endpoint configured to be https://aws-serverless-tools-telemetry.us-west-2.amazonaws.com/metrics
local start-api command is called
Collected default values for parameters: {}
2 resources found in the template
Sending Telemetry: {'metrics': [{'commandRun': {'awsProfileProvided': False, 'debugFlagProvided': True, 'region': '', 'commandName': 'sam local start-api', 'duration': 37, 'exitReason': 'DockerException', 'exitCode': 255, 'requestId': '3c51c498-e9db-451d-bf4a-fd5240e5f305', 'installationId': '072d408a-950f-4a21-bb6b-cea85e65da65', 'sessionId': 'f271c9bb-1a19-41ea-aade-3b5fc99bac80', 'executionEnvironment': 'CLI', 'pyversion': '3.8.0', 'samcliVersion': '0.22.0'}}]}
HTTPSConnectionPool(host='aws-serverless-tools-telemetry.us-west-2.amazonaws.com', port=443): Read timed out. (read timeout=0.1)
Traceback (most recent call last):
  File "c:\program files\python38\lib\site-packages\docker\api\client.py", line 154, in __init__
    self._custom_adapter = NpipeHTTPAdapter(
NameError: name 'NpipeHTTPAdapter' is not defined

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "c:\program files\python38\lib\runpy.py", line 192, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:\program files\python38\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Program Files\Python38\Scripts\sam.exe\__main__.py", line 7, in <module>
  File "c:\program files\python38\lib\site-packages\click\core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "c:\program files\python38\lib\site-packages\click\core.py", line 717, in main
    rv = self.invoke(ctx)
  File "c:\program files\python38\lib\site-packages\click\core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "c:\program files\python38\lib\site-packages\click\core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "c:\program files\python38\lib\site-packages\click\core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "c:\program files\python38\lib\site-packages\click\core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "c:\program files\python38\lib\site-packages\click\decorators.py", line 64, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
  File "c:\program files\python38\lib\site-packages\click\core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "c:\program files\python38\lib\site-packages\samcli\lib\telemetry\metrics.py", line 93, in wrapped
    raise exception  # pylint: disable=raising-bad-type
  File "c:\program files\python38\lib\site-packages\samcli\lib\telemetry\metrics.py", line 62, in wrapped
    return_value = func(*args, **kwargs)
  File "c:\program files\python38\lib\site-packages\samcli\commands\local\start_api\cli.py", line 75, in cli
    do_cli(
  File "c:\program files\python38\lib\site-packages\samcli\commands\local\start_api\cli.py", line 123, in do_cli
    with InvokeContext(
  File "c:\program files\python38\lib\site-packages\samcli\commands\local\cli_common\invoke_context.py", line 141, in __enter__
    self._container_manager = self._get_container_manager(self._docker_network, self._skip_pull_image)
  File "c:\program files\python38\lib\site-packages\samcli\commands\local\cli_common\invoke_context.py", line 381, in _get_container_manager
    return ContainerManager(docker_network_id=docker_network, skip_pull_image=skip_pull_image)
  File "c:\program files\python38\lib\site-packages\samcli\local\docker\manager.py", line 34, in __init__
    self.docker_client = docker_client or docker.from_env()
  File "c:\program files\python38\lib\site-packages\docker\client.py", line 84, in from_env
    return cls(
  File "c:\program files\python38\lib\site-packages\docker\client.py", line 40, in __init__
    self.api = APIClient(*args, **kwargs)
  File "c:\program files\python38\lib\site-packages\docker\api\client.py", line 158, in __init__
    raise DockerException(
docker.errors.DockerException: Install pypiwin32 package to enable npipe:// support

[jfuss]

pypiwin32 is a dependency of the docker-py library, for win32 only. Looking at docker-py: https://pypi.org/project/docker/ they don’t yet claim support for python3.8, neither do we (yet). Given the last release of pypiwin32, https://pypi.org/project/pypiwin32/#history, not sure if that even supports py3.8 either.

Using the MSI for windows is the best path.

Resolving since the issue was resolved by using the MSI instead of pip.

[plantusd]

I think that the issue was caused by upgrading aws-sam-cli via pip resolved by pip uninstalling aws-sam-cli and installing it from .msi