07 Dependency Unavailable

Time to first impact

T+0 to 1m. first impact at 1.5s.

What was injected

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

What happened

queue backed up for 60s while the payments stub was down

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.