---
title: Runbook — DEPENDENCY_TIMEOUT (외부 의존성 타임아웃)
category: TRANSIENT_DEPENDENCY
error_codes: [DEPENDENCY_TIMEOUT]
severity: P1
owner: oncall
last_updated: 2026-06-15
status: stub
---

# Runbook: DEPENDENCY_TIMEOUT (`runbook://dependency/timeout`)

## Symptoms

- HTTP 504 with `error.code=DEPENDENCY_TIMEOUT`
- Upstream service did not respond within configured timeout (default: global 10s)

## Diagnosis

- Check `dependency_name` in log for which upstream is timing out
- Review upstream service latency metrics

## Action

- Check upstream service health
- Verify timeout settings match SLA expectations

## Escalation

- P1 if critical upstream is timing out at scale

---

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