Why and how does your app fail even though the logs look fine?

Vikashagarwal10 Oct, 2025Education

In cloud environments, a request from a user could go through several layers - from the API gateway to a microservice, then the database. If something fails in the middle, your primary app might not even be aware of it. That's where tools like AWS X-Ray, Jaeger, or OpenTelemetry come into play. They follow the whole journey of a request so you know where it lagged or went bust. People who take an Aws Devops Online Course learn to use these tracing tools along with logs. They also learn to create small “health checks” that act like test users. These fake users continuously check if key parts of your system are working. If they fail, you know something is wrong even if the logs look fine.