Unable to use New Relic layer in lambda that is already using the aws-lambda-web-adapter layer

[lucaswehmuth]

Description

The lambda runtime is unable to locate the _newrelic_lambdawrapper.handler in a lambda that uses the aws-lambda-web-adapter layer (https://github.com/awslabs/aws-lambda-web-adapter) which apparently is another wrapper.

So the issue is trying to set a wrapper inside another wrapper.

Steps to Reproduce

Define a lambda resource using the Serverless Application Model (SAM) like the one below:

  LambdaRestApiWebhooksAuth:
    Type: AWS::Serverless::Function
    DependsOn: RestApiWebhooksAuth
    Properties:
      CodeUri: ./src/handler
      Handler: newrelic_lambda_wrapper.handler
      FunctionName: !FindInMap [StageMappings, !Ref StageName, lambdaNameHandler]
      Role: !Sub "arn:aws:iam::${AWS::AccountId}:role/role-lambda-api"
      Architectures:
        - arm64
      Runtime: python3.10
      MemorySize: 128
      Environment:
        Variables:
          AWS_LAMBDA_EXEC_WRAPPER: /opt/bootstrap
          PORT: "8000"
          ENV: !Ref StageName
          NEW_RELIC_LAMBDA_HANDLER: run.sh
          NEW_RELIC_ACCOUNT_ID: "<ACCOUNT_ID>"
          NEW_RELIC_TRUSTED_ACCOUNT_KEY: "<ACCOUNT_ID>"
          NEW_RELIC_LICENSE_KEY: "<API_KEY>"
      Layers:
        - !Sub arn:aws:lambda:${AWS::Region}:753240598075:layer:LambdaAdapterLayerArm64:20
        - "arn:aws:lambda:us-east-1:451483290750:layer:NewRelicPython310ARM64:27"
      Timeout: 15

or use the sample code provided by AWS itself and then apply the following environment variables:

AWS_LAMBDA_EXEC_WRAPPER: /opt/bootstrap
PORT: "8000"
ENV: !Ref StageName
NEW_RELIC_LAMBDA_HANDLER: run.sh
NEW_RELIC_ACCOUNT_ID: "<ACCOUNT_ID>"
NEW_RELIC_TRUSTED_ACCOUNT_KEY: "<ACCOUNT_ID>"
NEW_RELIC_LICENSE_KEY: "<API_KEY>"

Expected Behaviour

The value inside the environment variable NEW_RELIC_LAMBDA_HANDLER should be able to be located by the New Relic wrapper

Relevant Logs / Console output

Lambda log error: /opt/bootstrap: line 3: /var/task/newrelic_lambda_wrapper.handler: No such file or directory

Your Environment

• AWS Lambda
• Python 3.10 ARM runtime
• LambdaAdapterLayerArm64 layer
• NewRelicPython310ARM64 layer

Additional context

Is there any suggested workaround for this lambda scenario? I could not find anything in the docs and neither in any past issues from github

[workato-integration[bot]]

https://new-relic.atlassian.net/browse/NR-279309