When using the export command, a Lambda function with Python 3.7 is automatically generated.

[kazuki-takaya-sp]

Amplify CLI Version

12.5.1

Question

When exporting CDK using the export command, the automatically created Lambda function is set to Python version 3.7, causing build failures.
What steps should be taken to address this issue?
I followed the instructions on the following URL to perform the export and CDK construction:
https://aws.amazon.com/jp/blogs/mobile/export-amplify-backends-to-cdk-and-use-with-existing-deployment-pipelines/

Extract from the automatically created CloudFormation stack:

    "CustomCDKBucketDeployment8693BB64968944B69AAFB0CC9EB8756C81C01536": {
      "Type": "AWS::Lambda::Function",
      "Properties": {
        "Code": {
          "S3Bucket": {
            "Fn::Sub": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}"
          },
          "S3Key": "a3058ccb468d757ebb89df5363a1c20f5307c6911136f29d00e1a68c9b2aa7e8.zip"
        },
        "Role": {
          "Fn::GetAtt": [
            "CustomCDKBucketDeployment8693BB64968944B69AAFB0CC9EB8756CServiceRole89A01265",
            "Arn"
          ]
        },
        "Handler": "index.handler",
        "Layers": [
          {
            "Ref": "assetAppsyncApplicationNamedeploymentAwsCliLayer8A65489E"
          }
        ],
        "Runtime": "python3.7",
        "Timeout": 900
      },
      "DependsOn": [
        "CustomCDKBucketDeployment8693BB64968944B69AAFB0CC9EB8756CServiceRoleDefaultPolicy88902FDF",
        "CustomCDKBucketDeployment8693BB64968944B69AAFB0CC9EB8756CServiceRole89A01265"
      ],
      "Metadata": {
        "aws:cdk:path": "ApplicationName/amplifyStage/AmplifyStack/Custom::CDKBucketDeployment8693BB64968944B69AAFB0CC9EB8756C/Resource",
        "aws:asset:path": "../asset.a3058ccb468d757ebb89df5363a1c20f5307c6911136f29d00e1a68c9b2aa7e8",
        "aws:asset:property": "Code"
      }
    },

[ykethan]

Hey @kazuki-takaya-sp, could you provide some information on the build failures you are experiencing on the export command. Any notable error messages?

[kazuki-takaya-sp]

Hi @ykethan
The following error message is being displayed.
The target ID being created is CustomCDKBucketDeployment8693BB64968944B69AAFB0CC9EB8756C81C01536, and it is believed to be an automatically created resource.
Can the issue be resolved by upgrading Amplify CLI?

Resource handler returned message: "The runtime parameter of python3.7 is no longer supported for creating or updating AWS Lambda functions. We recommend you use the new runtime (python3.12) while creating or updating functions. (Service: Lambda, Status Code: 400, Request ID: 3858764d-fd31-436d-baff-7024c6c7ab74)" (RequestToken: 3c5dcc18-eb65-319e-97f5-b706d8078310, HandlerErrorCode: InvalidRequest)

[kazuki-takaya-sp]

hi @ykethan
This issue has been resolved. It turns out the problem was due to implementing based on a sample, which was built using AWS-CDK v1
Updating to AWS-CDK V2 resolved this issue. Thank you for your assistance.

[ykethan]

@kazuki-takaya-sp glad to hear you were able to resolve the issue. Closing this issue, do reach out if you are experiencing any issues with Amplify CLI

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