05 DNS Resolution Failure
failed · run 2026-06-01 04:00 UTC
Time to first impact
T+0 to 4s. first impact at 2s.
What was injected
DNS Resolution Failure — nothing was injected: this is the worked example
What happened
directory lookups failed; sign-in down until DNS returned
Impact
| time to first impact | 2s |
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.