Update to the API Gateway runtime architecture

Update to the API Gateway runtime architecture

The API Gateway runtime architecture is being updated to improve its integration with Google Cloud Platform and its services.

This update does not affect existing API Gateway features. However, be aware of the following differences:

• Status code changes for gRPC API Gateways

Error New status code Previous status code

Quota exceeded ResourceExhausted Unavailable

Invalid API key InvalidArgument InternalError • For 4xx client-side quota failures, API Gateway will now reject requests (fail closed). This applies to both gRPC and OpenAPI API Gateways.

If you experience any other differences in behavior due to this update, contact Google Cloud Customer Care.

Note: Rollouts of this release to production instances might take up to 4 weeks to complete across all Google Cloud zones. Your instances might not be updated until the rollout is complete.