Error Message

An error occurred: ApiGatewayDeploymentxxxxxx - Another Deployment is in progress for rest api with id xxxxxxxx. Please try again later. (Service: AmazonApiGateway; Status Code: 409; Error Code: ConflictException; Request ID: xxxx-xxxx-xxxx-xxxx-xxxx).

Problem

This error happens when multiple Serverless services that share the same API Gateway project are being deployed concurrently.

It happens because Serverless Framework creates an AWS::ApiGateway::Deployment resource in the CloudFormation stack. And when multiple services are being deployed concurrently, multiple of these AWS::ApiGateway::Deployment resources are created against the same API Gateway project, resulting in the above error. These resources are usually created very quickly, so this error happens quite rarely.

Solution

If your deployment failed because you were concurrently deploying your services, you’ll need to retry the deployment.

  1. Check if the CloudFormation stack is in the ROLLBACK_COMPLETE state.

  2. If it is, then you’ll need to remove the stack from the CloudFormation console before proceeding. You cannot update a stack that’s in the ROLLBACK_COMPLETE state, you’ll get the following error if you do.

    Stack:arn:aws:cloudformation:us-xxxx-x:xxxxxxxxx:stack/xxx-xx-prod/xxxx-xxxx-xxxx-xxxx-xxxx is in ROLLBACK_COMPLETE state and can not be updated.

  3. After the stack has been removed you can try deploying the service again.

Note that, Seed will do the above automatically. It’ll check the CloudFormation stack status, remove the stack if necessary, and retry the deployment (up to 3 times). You can read more about this here.