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typescript.circuit_breaker

Stability High

Detects external service calls without circuit breaker protection.

Why It Matters

Missing circuit breakers:

Cascade failures — One service down brings everything down
Resource exhaustion — Threads blocked waiting
No recovery — System stays broken after transient issues

Example

// ❌ Before (no circuit breaker)
async function callPaymentService(payment: Payment): Promise<Receipt> {
  return axios.post('/api/payments', payment);
}

// ✅ After (with circuit breaker)
import CircuitBreaker from 'opossum';

const breaker = new CircuitBreaker(
  async (payment: Payment) => axios.post('/api/payments', payment),
  {
    timeout: 3000,
    errorThresholdPercentage: 50,
    resetTimeout: 30000,
  }
);

async function callPaymentService(payment: Payment): Promise<Receipt> {
  return breaker.fire(payment);
}

What Unfault Detects

HTTP clients without circuit breakers
gRPC calls without protection
Database calls without failover

Auto-Fix

Unfault can add opossum circuit breaker wrapper.