Question

When implementing a circuit breaker, what state must the system transition to if the failure rate exceeds the predefined threshold, and what is its specific purpose?

Accepted Answer

When the failure rate of a service exceeds a predefined threshold, the circuit breaker must transition to the Open state. The specific purpose of the Open state is to stop the system from sending any further requests to the failing service. By immediately rejecting all outgoing calls, the system prevents cascading failures, which occur when a failing component causes dependent services to crash due to waiting for timeouts or exhaustion of resources. This state essentially acts as a safety fuse, giving the troubled service time to recover and offloading the pressure from the calling system. During this phase, the circuit breaker typically returns an error or a fallback response to the user instead of attempting to communicate with the service that is known to be unavailable.

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When implementing a circuit breaker, what state must the system transition to if the failure rate exceeds the predefined threshold, and what is its specific purpose?

When the failure rate of a service exceeds a predefined threshold, the circuit breaker must transition to the Open state. The specific purpose of the Open state is to stop the system from sending any further requests to the failing ser....