"Invalid HTTP upgrade", code: 404)) for 3.0.6 version of Starscream

[rampn443]

Describe the bug

We have deployed an Application Load Balancer (ALB) for our spingboot application which consists of both Rest and Websocket services hosted in EKS cluster. We added health check, ssl redirect etc. annotations in the ingress.yaml file. The listener is HTTPS: 443 and the SSL certificate is from ACM and TLS termination is happening at the ingress.

When we hit the ALB endpoint, rest service is working fine but receiving the following error with the websocket service.

Websocket Optional(wss://xxx.xx.xx.com:443/xx/xx/xx/xx) disconnected with error Optional(Starscream.WSError(type: Starscream.ErrorType.upgradeError, message: "Invalid HTTP upgrade", code: 404))

The same is working fine with the Network Load balancers in AWS.

app.kubernetes.io/instance: aws-load-balancer-controller app.kubernetes.io/name: aws-load-balancer-controller app.kubernetes.io/version: v2.3.0 helm.sh/chart: aws-load-balancer-controller-1.3.2 Kubernetes version: 1.19 Platform version: eks.7

Environment:

• Starscream Version: 3.0.6
• Xcode version: 13.2.1

Any help in resolving this issue is highly appreciated. Thank you!

[acmacalister]

Any steps to reproduce, sample projects, etc would be appreciated.