How can the developer resolve this issue?
Create a new Lambda function alias before updating the CloudFormation stack.
Change the S3 object key or the S3 version in the CloudFormation template before updating the CloudFormation stack.
Upload the zipped source code to another $3 bucket before updating the CloudFormation stack.
Associate a code signing configuration with the Lambda function before updating the CloudFormation stack.
Explanations:
Creating a new Lambda function alias does not resolve the issue. Aliases are used for versioning and traffic shifting, but they do not address the issue of CloudFormation not detecting changes in the Lambda code.
Changing the S3 object key or the S3 version triggers CloudFormation to recognize a change in the Lambda function code. Since the Lambda function is sourced from an S3 bucket, any modification to the S3 object key or version will cause CloudFormation to deploy the new code.
Uploading the zipped source code to a different S3 bucket does not resolve the issue unless the S3 object key or version changes. The core problem is that CloudFormation is not detecting changes to the Lambda function’s code, not the bucket location.
Associating a code signing configuration is related to ensuring the integrity and authenticity of Lambda function code, but it does not address the issue of CloudFormation not detecting changes in the Lambda function code. It is unrelated to triggering updates based on code changes.
I value that the answer is:
Change the S3 object key or the S3 version in the CloudFormation template before updating the CloudFormation stack.