Understanding and Configuring Circuit Breakers in Distributed Systems Using Resilience4j

Distributed microservice systems frequently face transient failures, latency spikes, and cas-cading outages. While retries help handle short-lived errors, they can amplify failures andexhaust system resources. Circuit breakers complement retries by temporarily halting requeststo failing services, protecting downstream dependencies, and stabilizing system behavior. Thispaper investigates circuit breaker configuration and behavior using Resilience4j. It providesactionable guidance on tuning parameters, balancing sensitivity and stability, and positioningcircuit breakers effectively to prevent oscillations, false positives, and cascading failures. Thefindings offer practitioners a systematic approach to improving resilience and reliability in large-scale microservice architectures.