Observability

One of the most common statements during a production incident is:

“Don’t worry, we have logs.”

Modern software teams have better tools than ever:

• CI/CD pipelines
• Infrastructure as Code
• Container orchestration (Kubernetes)
• Monitoring and alerting systems
• Cloud-native architectures

When building Spring Boot applications, one of the first decisions you’ll make is choosing the HTTP client for communicating with other services.

For years, RestTemplate was the standard solution. Today, WebClient is the recommended choice for new applications.

In distributed systems, logging and exception handling are not just debugging tools — they are core parts of system reliability and observability.

Poor logging makes production issues hard to diagnose, while improper exception handling often leads to hidden failures, inconsistent states, and frustrated users.