← 문제 라이브러리
Network Beginner 3 min

504 Gateway Timeout: only the order list fails after a table migration

A 504 means the upstream answered too slowly; find out why.

무료
시나리오

After moving the orders table, only the admin order list returns 504 after exactly 60 seconds. nginx: 'upstream timed out ... while reading response header from upstream'. App: 'slow query 62.3s SELECT * FROM orders WHERE customer_id = 8812'.

먼저 볼 것
  • Understand the main investigation order for Network incidents.
  • Separate user-facing symptoms from the deeper technical cause.
  • Describe both quick recovery actions and follow-up improvements.
점검 체크리스트
  1. Summarize the symptom and the current impact first.
  2. Check recent changes before collecting deeper diagnostics.
  3. Verify config, runtime state, and recovery path in order.
복구와 재발 방지

Write down the minimal recovery path first, then capture the improvements that reduce repeat incidents.

같이 보면 좋은 질문
Should I translate commands, logs, or product names?

No. Keep commands, logs, file names, APIs, and product names unchanged, then explain the reasoning in the selected UI language.

What should the answer focus on?

State the root cause, the evidence that supports it, and the safest recovery direction.

Why can the scenario remain in the original language?

The source scenario is treated as an incident artifact. Guidance, checklist, hints, and explanations can be localized around it.