35 lines
829 B
Markdown
35 lines
829 B
Markdown
---
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title: Runbook — DEPENDENCY_4XX_CLIENT (업스트림 클라이언트 오류)
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category: PERMANENT_DEPENDENCY
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error_codes: [DEPENDENCY_4XX_CLIENT]
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severity: P2
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owner: oncall
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last_updated: 2026-06-15
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status: stub
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---
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# Runbook: DEPENDENCY_4XX_CLIENT (`runbook://dependency/4xx-client`)
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## Symptoms
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- HTTP 502 with `error.code=DEPENDENCY_4XX_CLIENT`
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- Upstream returned 401/403/400 — credential, scope, or request format issue
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## Diagnosis
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- Check upstream response body in logs for error detail
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- Verify API credentials and scopes are valid
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## Action
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- Rotate credentials if expired
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- Fix request format if API contract changed
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## Escalation
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- Escalate to upstream API owner if contract change is suspected
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---
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> **Stub**: Phase D2 — author body after domain adoption. (feature-operational-runbook-contract D9)
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