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HTTP Status Codes

HTTP 504 Gateway Timeout

504 Gateway Timeout

A gateway or proxy server did not receive a timely response from the upstream server it needed to complete the request.

504 Gateway Timeoutnetworking

Observed message

504 Gateway Timeout

Why it happens

  • The upstream service is too slow to respond.
  • A proxy or load balancer timeout is shorter than the backend processing time.
  • Network problems are delaying or preventing the upstream response.

How to fix it

  1. Check backend response times and whether the upstream is overloaded.
  2. Review gateway and proxy timeout settings against real request duration.
  3. Investigate network path and dependency latency between the proxy and upstream.

Official reference

MDN: 504 Gateway Timeout

Related errors

408 Request TimeoutHTTP 408 Request Timeout413 Content Too LargeHTTP 413 Content Too Large414 URI Too LongHTTP 414 URI Too Long429 Too Many RequestsHTTP 429 Too Many Requests

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504 Gateway Timeout: what it means and how to fix it | Error Atlas