AWS Lambda with Java21 uses incorrect docker image

[drew-corporate-creations]

Using serverless V4.2.4 and Localstack V3.6.0

I have a lambda function with an API gateway.

When using:
provider: name: aws runtime: java21

I get this error in the localstack logs when trying to use the api gateway:

404 Client Error for http+docker://localhost/v1.41/images/create?tag=java21&fromImage=lambci%2Flambda: Not Found ("manifest for lambci/lambda:java21 not found: manifest unknown: manifest unknown")

This error does not occur with Java11.

The lambdaci docker images were deprecated last year in favor of the official AWS ones.

Given that serverless and localstack support java21, I assume the error is in the plugin (though I really have no idea).

I found this same issue with terraform localstack/localstack#10683
The solution for that issue was to fix the terraform (not localstack).

I'm a bit lost here as to how to get this working. Any advice would help.

[drew-corporate-creations]

I've ran into the same issue when using cloudformation. So I think it's safe to say it's not an issue with the serverless plugin. I assume there's a problem with Localstack V3.6.0 when installed using the installation instructions on the localstack website: brew install localstack/tap/localstack-cli

I'm going to try using a previous version of localstack from a docker container.