raise ValueError("Unsupported Lambda runtime {}".format(runtime))

Question

Has anyone had this error recently?

File "C:\Program Files\Amazon\AWSSAMCLI\runtime\lib\site-packages\samcli\local\docker\lambda_container.py", line 65, in init raise ValueError("Unsupported Lambda runtime {}".format(runtime)) ValueError: Unsupported Lambda runtime nodejs12.x

If so, how did you solve it?

So far I have tried uninstalling aws-sam-cli and reinstalling. Then I tried the same with Docker.

I have checked that the runtime for is set to nodejs12.x for each lambda function.

It gets thrown when I try to debug any lambda function locally in vscode. Up until about 2 weeks ago I was able to debug. All I find when I Google the problem are various references to the fact that "On 18th November 2019, AWS published they are now supporting Node.js 12.x runtime in AWS Lambda".

Thanks in advance to anyone who might be able to help me.

Answer 1

AWS Sam released a new version v1.21.0 just 30 minutes after you asked the question.

I recommend you upgrade again now that version and try again.

Here are the release notes for that version: https://github.com/awslabs/serverless-application-model/releases/tag/v1.21.0

One of the reasons it is not working is you may be using lambda edge, which doesn't support runtime node 12.x yet.

Reference: https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/lambda-requirements-limits.html