High 5xx error rate indicating backend or routing failures
criticalavailabilityUpdated Feb 9, 2026(via Exa)
Sources
Technologies:
How to detect:
5xx error rate exceeds 5% of total requests for 5 minutes, indicating backend service failures, misconfigurations, or routing issues.
Recommended action:
Investigate backend service health using traefik_service_server_up metric. Check backend service logs for errors. Review IngressRoute configurations for correct service names and ports. Query error distribution by service: rate(traefik_service_requests_total{code=~"5.."}[5m]). Verify backend services are running and accessible from Traefik pods.