Circuit Breaker
Circuit Breaker is a software design pattern used to detect failures and prevent cascading failures in distributed systems by temporarily blocking requests to a failing service. It acts as a proxy that monitors for failures and, when a threshold is exceeded, opens the circuit to stop further requests, allowing the failing service time to recover. This pattern improves system resilience and stability by handling faults gracefully and avoiding resource exhaustion.
Developers should learn and use the Circuit Breaker pattern when building microservices, APIs, or any distributed system where service dependencies can fail, to prevent a single point of failure from bringing down the entire application. It is particularly useful in scenarios with high latency, network issues, or unreliable third-party services, as it helps maintain responsiveness and provides fallback mechanisms, such as returning cached data or default responses, during outages.