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

---

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