Circuit Breaker Pattern Explained: How to Stop One Failing Service from Crashing Your App

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In distributed systems, a slow or failing service can cause cascading failures as other services keep waiting for responses, consuming threads, connections, and memory. The Circuit Breaker design pattern addresses this by monitoring service calls and "opening" the circuit to block requests when failures exceed a threshold, preventing resource exhaustion. Borrowed from electrical engineering, the pattern operates in three states: Closed (normal operation), Open (requests blocked), and Half-Open (limited test requests to check recovery). Without such a safeguard, a single unhealthy downstream service — like a pizza ordering API under load — can degrade otherwise healthy upstream services. Implementing circuit breakers in agentic and microservices applications is considered a key resilience strategy for production-grade systems.

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Presigned URLs vs Proxy Uploads: When to Use Each for File Storage

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ProgrammingHacker News ·

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Article URL: https://blog.jim-nielsen.com/2026/ai-aesthetic/ Comments URL: https://news.ycombinator.com/item?id=49117099 Points: 3 # Comments: 0

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

Tiered Architecture Beats LLM-as-Judge for AI Security, Developer Argues

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