tech-log-backend/docs/runbooks/dependency-5xx-server.md

title, category, error_codes, severity, owner, last_updated, status

title	category	error_codes	severity	owner	last_updated	status
Runbook — DEPENDENCY_5XX_SERVER (업스트림 서버 오류)	TRANSIENT_DEPENDENCY	DEPENDENCY_5XX_SERVER	P1	oncall	2026-06-15	stub

Runbook: DEPENDENCY_5XX_SERVER (runbook://dependency/5xx-server)

Symptoms

• HTTP 502 with error.code=DEPENDENCY_5XX_SERVER
• Upstream returned 5xx; transient server-side failure

Diagnosis

• Check dependency_name tag for which upstream is failing
• Review upstream service status page

Action

• Client should retry (retryable=true)
• Monitor upstream recovery

Escalation

• P1 if critical upstream is in sustained 5xx state

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Stub: Phase D2 — author body after domain adoption. (feature-operational-runbook-contract D9)