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Circuit breaker
Make a service your API depends on fail or hang. Watch threads pile up — and how a circuit breaker keeps the rest of the API alive.
How it works
- 1Every call to another service holds a thread until it answers. If that service hangs, threads run out and the whole API stops — even endpoints that never call it.
- 2A circuit breaker counts recent failures. Past a threshold it opens, and calls fail at once instead of waiting.
- 3After a pause it lets a few trial calls through. If they work, it closes again.
Read the post: How to build an API for 100,000 requests a second
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