[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"glossary-circuit-breaker::en":3,"gloss-cluster-circuit-breaker::en":26,"gloss-next-circuit-breaker::en":9},{"slug":4,"category":5,"name":6,"definition":7,"meta_desc":8,"faq":9,"schema_markup":9,"related":10},"circuit-breaker","dev-tools","Circuit Breaker","A circuit breaker is a resilience pattern that stops your service from repeatedly calling a dependency that's already failing. Like the electrical device it's named after, it has three states: closed (calls flow through normally), open (after too many failures, calls are rejected instantly without even trying), and half-open (after a cooldown, it lets a trickle of requests through to test whether the dependency recovered). The point is to fail fast: instead of thousands of requests piling up on a dead database — exhausting threads and connection pools and dragging down your whole app — the breaker trips and you return a fast error or a cached fallback. This prevents one struggling dependency from cascading into a full outage. For SaaS builders integrating third-party APIs (payments, email, an LLM provider), a circuit breaker is essential defensive plumbing. It pairs with timeouts, retries with backoff, and bulkheads; service meshes and libraries like resilience4j often provide it out of the box.","A circuit breaker stops your service hammering a dependency that's already failing — closed, open, half-open — turning a slow cascade into a fast, contained failure.",null,[11,14,17,20,23],{"slug":12,"name":13},"idempotency","Idempotency",{"slug":15,"name":16},"message-queue","Message Queue",{"slug":18,"name":19},"observability","Observability",{"slug":21,"name":22},"rate-limiting","Rate Limiting",{"slug":24,"name":25},"service-mesh","Service Mesh",[27,31,34,38,41,44,47,50,53,56,59,62],{"slug":28,"category":5,"name":29,"updated_at":30},"agent","Agent","2026-08-24T02:46:36+00:00",{"slug":32,"category":5,"name":33,"updated_at":30},"ai-code-assistant","AI Coding Assistant",{"slug":35,"category":5,"name":36,"updated_at":37},"api-gateway","API Gateway","2026-08-24T02:46:37+00:00",{"slug":39,"category":5,"name":40,"updated_at":37},"api-versioning","API Versioning",{"slug":42,"category":5,"name":43,"updated_at":30},"autonomous-agent","Autonomous Agent",{"slug":45,"category":5,"name":46,"updated_at":37},"blue-green-deployment","Blue-Green Deployment",{"slug":48,"category":5,"name":49,"updated_at":37},"canary-deployment","Canary Deployment",{"slug":51,"category":5,"name":52,"updated_at":37},"chaos-engineering","Chaos Engineering",{"slug":54,"category":5,"name":55,"updated_at":30},"ci-cd","Continuous Integration \u002F Continuous Deployment (CI\u002FCD)",{"slug":57,"category":5,"name":58,"updated_at":37},"cli","Command-Line Interface (CLI)",{"slug":60,"category":5,"name":61,"updated_at":37},"cloud-development-environment","Cloud Development Environment (CDE)",{"slug":63,"category":5,"name":64,"updated_at":30},"code-completion","Code Completion"]