How a “Kind of Working” Payment Gateway Made Me Write This Circuit Breaker
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I got bored and wrote a circuit breaker A few years ago I was working at a fintech company. We had an integration with a payment gateway. Critical one — money literally depended on it. One day it started behaving weird. Not down. Not healthy. Just slow enough to destroy everything. Requests were hanging. Threads piling up. Retries amplifying the problem. Other services started lagging. The gateway was still responding — just slowly enough to kill us. We needed a circuit breaker. W