05 DNS Resolution Failure
degraded · run 2026-08-05 02:00 UTC
Time to first impact
T+0 to 18s. first impact at 3s.
What was injected
DNS Resolution Failure — nothing was injected: this is the worked example
What happened
resolver timeouts for 18s until the cache warmed
Impact
| time to first impact | 3s |
| time impaired | 15s |
Remediation
- Cache resolved names for their TTL and keep serving the last good answer when the resolver fails; a lookup per request is a dependency per request.