Circuit Breakers with Resilience4j

Microservices are great, but they also bring new challenges. When one service fails, it shouldn't take down the whole system. This is where resilience comes in.

Building resilient systems means they can recover gracefully from failures and continue to function, even if in a degraded mode. It's crucial for maintaining service availability and user experience.

Imagine a chain of services: Service A calls B, which calls C. If Service C becomes slow or unresponsive, Service B will wait, consuming resources. Then Service A will wait for B, and so on.

Eventually, all services in the chain might exhaust their resources (like threads or connections) and fail, leading to a complete system outage. This is a cascading failure, a common problem in distributed systems.