cannot debug nodejs16 (node 16) lambda in local docker

[justinmk3]

Description:

Looks like index.js is missing in the nodejs Lambda image, and that is the expected entrypoint for local Docker-based Lambda debugging:

aws-sam-cli/samcli/local/docker/lambda_debug_settings.py

Line 137 in d7e0c43

+ ["/var/runtime/index.js"],

docker run -it --entrypoint=bash public.ecr.aws/lambda/nodejs:16`
bash-4.2# cat /var/runtime/index.js
cat: /var/runtime/index.js: No such file or directory

Related:

• Node v16 Released 🎉 aws-lambda-base-images#14 (comment)
• VSCode cannot debug nodejs12 based lambda function due to wrong NODE_PATH in image #2573
• fix: use correct entry file for node 16 debugging #3913
• Bug: sam local invoke -d option now working with nodejs16.x #3886

Steps to reproduce:

sam build
sam local invoke --debug HelloWorldFunction --template template.yaml -d 5861

Try to attach a nodejs debugger to port 5861.

Observed result:

debugger fails to attach:

Error: Cannot find module '/var/runtime/index.js'
    at Function._resolveFilename (node:internal/modules/cjs/loader:933:15)
    at Function._load (node:internal/modules/cjs/loader:778:27)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12)
    at node:internal/main/run_main_module:17:47 {
  code: 'MODULE_NOT_FOUND',
  requireStack: []
}
27 May 2022 16:59:01,657 [ERROR] (rapid) Init failed error=Runtime exited with error: exit status 1 InvokeID=

Expected result:

can attach nodejs debugger.

Additional environment details (Ex: Windows, Mac, Amazon Linux etc)

1. OS: macos
2. sam --version: 1.50
3. AWS region: n/a

[justinmk3]

as a workaround (or maybe it's the proper fix?) here is a PR for sam cli (as opposed to changing the Lambda image): #3913

[mingkun2020]

Thanks @justinmk3 for submitting the issue, does the above fix working for this issue?

[mndeveci]

This is been released with SAM CLI v1.51.0