# An Istio 1.32 DestinationRule sets outlierDetection.failurePercentageThreshold: 30 for a busy service with three pods. Why is no pod ever ejected for its failure rate?

Istio, Hard (Expert), Traffic Management. https://k8wiz.com/uquiz/an-istio-132-destinationrule-sets-outlierdetectionfailurepercentagethreshold-30-for-a-busy-service-with-three-pods-why-is-no-pod

- A. The threshold only applies when consecutive5xxErrors is set to 0
- B. Failure rate ejection needs maxEjectionPercent set to 100
- C. Envoy skips failure percentage ejection in clusters with fewer than 5 hosts
- D. The threshold counts only gateway errors, not other 5xx responses

**Answer:** Envoy skips failure percentage ejection in clusters with fewer than 5 hosts

**Explanation:** Istio sets the threshold and enables enforcement but leaves Envoy's failure_percentage_minimum_hosts at its default of 5, and failure_percentage_request_volume at 50 requests per interval. A three-pod service is below the host minimum, so only the consecutive error counters can eject its pods.