A city Elastic Beanstalk release through CodeDeploy fails. Service output logs show a failed health-check hook, not a compile error. What should the team conclude first?
Select an answer to reveal the explanation.
Short Explanation
The compiler can be fine and the release still face-plants. Beanstalk/CodeDeploy service output saying a health-check hook failed is your smoking gun—read those deploy logs before blaming a build error that is not there.
Full Explanation
When a city Elastic Beanstalk release through CodeDeploy fails and service output logs show a failed health-check hook—not a compile error—the first conclusion should follow that evidence: diagnose the failed health-check hook during the release. Deployment hooks and health checks gate traffic; a red hook means the new revision did not become healthy enough to proceed, which is distinct from a build compile failure already cleared in CI.
Ignoring service logs and rebuilding the AMI because "every Beanstalk failure is an OS image problem" skips the actual hook output and wastes hours. Treating the failure as a DynamoDB schema migration is unsupported when logs cite health hooks, not data migrations. Assuming API Gateway custom domains caused the CodeDeploy failure without reading hook output invents a root cause disconnected from the evidence.
Exam caveat: read deployment and service logs before changing infrastructure layers; health-check failures often stem from failing application endpoints, timeouts, security group reachability, or misconfigured hooks.
Operational check: open the failed deployment's hook and service logs, reproduce the health URL against a failing instance, fix the application or hook configuration, redeploy to a non-production Beanstalk environment, and only then retry the city production release.