07 Dependency Unavailable

Time to first impact

T+0 to 1.6s. first impact at 0.8s.

What was injected

Dependency Unavailable — nothing was injected: this is the worked example

What happened

no circuit breaker; gateway queued until timeout

Impact

Remediation

• Wrap the dependency in a circuit breaker with a fallback — a cached answer, a degraded page, a queued write — so its outage is not the caller's.