CloudFormation: error during deployment

Question

I am developing  AWS Lambda as NET 6 Web Service.
and use Github Action for build and deployment.

During the deployment step I have an error:

Run aws cloudformation deploy --template-file ./aws/cfn/pm2customers-lambda.yml --stack-name pm2customers-lambda-apigw --parameter-overrides \

Waiting for changeset to be created..
Waiting for stack create/update to complete

Failed to create/update the stack. Run the following command
to fetch the list of events leading up to the failure
aws cloudformation describe-stack-events --stack-name pm2customers-lambda-apigw
Error: Process completed with exit code 255.

How to fixt it?

Upd.
I have got the log
>aws cloudformation describe-stack-events --stack-name pm2customers-lambda-apigw >c:\myaws\cf.log

And found:

"ResourceStatus": "CREATE_FAILED",
            "ResourceStatusReason": "Resource handler returned message: \"Uploaded file must be a non-empty zip 
			(Service: Lambda, Status Code: 400, Request ID: be2da973-058a-4d92-b477-f48c0752b1da)\" 
			(RequestToken: 1aba761f-cf60-e04c-c777-ed563241b2b4, HandlerErrorCode: InvalidRequest)",
            "ResourceProperties": "{\"Role\":
			\"arn:aws:iam::074745971345:role/pm2customers-lambda-apigw-LambdaExecutionRole-1I8I18GU0B8TV\",
			\"FunctionName\":\"pm2customer-lambda-apigw-dev-lambda\",\"MemorySize\":\"512\",\"Runtime\":\"dotnet6\",
			\"Timeout\":\"60\",\"Handler\":\"MinimalApiSample\",\"Code\":
			{\"S3Bucket\":\"pm2customer-lambda-apigw-bucket\",\"S3Key\":
			\"pm2customerlambda-f7e2816b94b6fea8f3975580a38dd04a9be4f4a7.zip\"},\"Architectures\":[\"arm64\"]}"

But the previous step completed OK, the app was built and zipped.
What else can I check?

Answer

The problem is due to this resource `pm2customer-lambda-apigw-dev-lambda` stating that the zip file is empty. You need to check the file `pm2customerlambda-f7e2816b94b6fea8f3975580a38dd04a9be4f4a7.zip` located in Bucket `pm2customer-lambda-apigw-bucket` if the zip file doesn't contain you compiled Lambda function code you need to validate your build step.

Answer

Hi,

you will need to check the individual events in CloudFormation to understand what happened. In order to do so, you can either run the mentioned command

`aws cloudformation describe-stack-events --stack-name pm2customers-lambda-apigw`

on the CLI or check the stack in the CloudFormation console. Please refer to https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/troubleshooting.html as well.

Answer

I did run into similar issue. It turns out the code is not saved in visual studio. The code uploaded into the S3 bucket is empty. After I save the code and re-do the process, it works out.

CloudFormation: error during deployment

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