After upgrading to cdk v2, getting Stack name must be <= 128 characters

Describe the bug

I have been using cdk with version 1.147.1, and my cdk apps were successfully deployed. After upgrading to cdk v2, I cant deploy my cdk app, getting “Stack name must be <= 128 characters” error message.

Looking at the stack name it tried to create, I cant understand what is going on, why is this name generated when I have provided a short logical id to all my resources and to the stack name itself.

I have a construct that exports an existing eks cluster (code is simplified just for example)

class EksCluster(Construct):
    def __init__(
        self,
        scope: Construct,
        stack_name: str,
        stage: str,
    ) -> None:
        super().__init__(scope, stack_name)
       self.cluster = self.import_cluster()

    def import_cluster(self) -> aws_eks.ICluster:
        return aws_eks.Cluster.from_cluster_attributes(
            self,
            id="imported-eks-cluster",
            cluster_name=cluster_name,
            kubectl_role_arn=kubectl_role_arn,
            open_id_connect_provider=open_id_provider,
            vpc=vpc,
        )

Then a simple app.py with the cdk app

app = App()
aws_lb_controller_stack = AwsLBControllerStack(
    app,
    f"aws-load-balancer-controller-{STAGE}",
    stage=STAGE,
    cluster_config=cluster_config,
    env=Environment(region=REGION, account=ACCOUNT),
)
app.synth()

And finally the stack itself, that uses the construct to use the eks cluster and create a service account for example

class AwsLBControllerStack(Stack):
    def __init__(
        self,
        scope: Construct,
        construct_id: str,
        stage: str,
        cluster_config: dict,
        **kwargs,
    ) -> None:
        super().__init__(scope, construct_id, **kwargs)
        self.eks_cluster = EksCluster(self, "eks-cluster", stage=stage)
        service_account = self.eks_cluster.cluster.add_service_account(
            "aws-lb-controller-service-account",
            name=AWS_LB_CONTROLLER_SERVICE_ACCOUNT_NAME,
            namespace=AWS_LB_CONTROLLER_NAMESPACE,
        )

This worked fine on cdk v1.147.1, but now after upgrading the cdk version and trying to deploy this code, it returns the following error:

jsii.errors.JSIIError: Stack name must be <= 128 characters. Stack name: 'awsloadbalancercontrollersandboxzolaawsloadbalancercontrollersandboxzolaeksclusterimportedeksekscluster980273B4KubectlProviderC92A5312'

Can you please explain what generated such a long name? And most importantly, how can this be fixed?

Expected Behavior

Stack names should be short and understandable like they are defined in their logical ids, and most importantly it should allow me to deploy my cdk app without generating the name and then not allowing me to deploy when I did not define such name anywhere in the app.

Current Behavior

Stack names are generated with multiple duplicates inside and just unreadable names.

Reproduction Steps

Posted above a simple setup in python

Possible Solution

No response

Additional Information/Context

No response

CDK CLI Version

2.21.1

Framework Version

No response

Node.js Version

v17.9.0

OS

macOS monterey 12.3.1

Language

Python

Language Version

3.10.2

Other information

No response

[comcalvi]

Thanks @michaelsatish, that reproduces the issue. I’ll be working on a fix for this asap.

[github-actions[bot]]

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