LAMBDA_RUNTIME Failed to get next invocation. No Response from endpoint on custom image

[chand1012]

I am working on testing a custom Lambda Docker image locally. The function works great when its being ran on AWS, but my team and I need local testing and to be able to test the image using CI. Here is the entire error output I am getting.

Traceback (most recent call last):
  File "/opt/bitnami/python/lib/python3.8/runpy.py", line 194, in _run_module_as_main
[ERROR] [1620144999666] LAMBDA_RUNTIME Failed to get next invocation. No Response from endpoint
    return _run_code(code, main_globals, None,
  File "/opt/bitnami/python/lib/python3.8/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/opt/bitnami/python/lib/python3.8/site-packages/awslambdaric/__main__.py", line 21, in <module>
    main(sys.argv)
  File "/opt/bitnami/python/lib/python3.8/site-packages/awslambdaric/__main__.py", line 17, in main
    bootstrap.run(app_root, handler, lambda_runtime_api_addr)
  File "/opt/bitnami/python/lib/python3.8/site-packages/awslambdaric/bootstrap.py", line 416, in run
    event_request = lambda_runtime_client.wait_next_invocation()
  File "/opt/bitnami/python/lib/python3.8/site-packages/awslambdaric/lambda_runtime_client.py", line 76, in wait_next_invocation
    response_body, headers = runtime_client.next()
RuntimeError: Failed to get next
Executing 'main.handler' in function directory '/'

Here is the Dockerfile.

FROM public.ecr.aws/bitnami/python:3.8-prod

RUN apt-get update && apt-get install --no-install-recommends -y build-essential ffmpeg \
    && apt-get clean && \
    rm -rf /var/lib/apt/lists/*

COPY . .

RUN pip install --upgrade pip
RUN pip install -r requirements.txt
RUN pip install awslambdaric

RUN apt-get purge build-essential -y && apt-get autoremove -y

WORKDIR /
ENTRYPOINT [ "python", "-m", "awslambdaric" ]
CMD ["main.handler"]

Here are the commands I am using to build and run the container.

$ docker build . -t downloader-lambda:latest
$ docker run -p 9000:8080 -e AWS_LAMBDA_RUNTIME_API="python3.8" -e AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID -e AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY -e AWS_LAMBDA_FUNCTION_NAME="downloader" downloader-lambda:latest

The post I was using for reference on how to do this can be found here. Most of our other lambdas aren't in containers so SAM can be used for testing, but we have a few that need to be tested locally that are containerized. Any help would be appreciated!

[GZaccaroni]

Same error!

Update on this?

[carlzogh]

Hey @chand1012 and @GZaccaroni - I believe you are referring to local testing of the RIC not working and this would be because of a missing Runtime API Server when you're trying to run the function. For local testing scenarios, I'd recommend having a look at the AWS Documentation on Testing Lambda container images locally with the Runtime Interface Emulator.

Does the image run successfully when invoked within Lambda?

[GZaccaroni]

Thank you @carlzogh , I solved by adding RIE following that tutorial https://docs.aws.amazon.com/lambda/latest/dg/images-test.html !

[gatesyp]

Worked for me too!

[luckyabsoluter]

https://docs.aws.amazon.com/lambda/latest/dg/python-image.html#python-image-clients
->
Using an alternative base image with the runtime interface client
->
(Optional) Test the image locally
->
From your project directory, run the following command to download the runtime interface emulator (x86-64 architecture) from GitHub and install it on your local machine.

mkdir -p ~/.aws-lambda-rie && \
    curl -Lo ~/.aws-lambda-rie/aws-lambda-rie https://github.com/aws/aws-lambda-runtime-interface-emulator/releases/latest/download/aws-lambda-rie && \
    chmod +x ~/.aws-lambda-rie/aws-lambda-rie

->
Start the Docker image with the docker run command. Note the following:

docker run --platform linux/amd64 -d -v ~/.aws-lambda-rie:/aws-lambda -p 9000:8080 \
    --entrypoint /aws-lambda/aws-lambda-rie \
    docker-image:test \
        /usr/local/bin/python -m awslambdaric lambda_function.handler

->
Post an event to the local endpoint.

curl "http://localhost:9000/2015-03-31/functions/function/invocations" -d '{}'