System Design Drill Day 10: Circuit Breakers, Timeouts and Degradation
The payment gateway starts timing out. The HTTP client retries, the queue retries, and workers pile up waiting on calls that won't come back. Soon pages that have nothing to do with payments are slow
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Diego Fernandez
Kubernetes, Terraform and the failures that only happen at 3am.
Circuit breakers only help if the fallback path is tested as often as the happy path.