---
set: 5
code: 504
title: Gateway Timeout
references:
    "Rails HTTP Status Symbol": ":gateway_timeout"
---

The 504 (Gateway Timeout) status code indicates that the server, while acting as
a gateway or proxy, did not receive a timely response from an upstream server it
needed to access in order to complete the request.

Source: [RFC7231 Section 6.6.5][1]

[1]: <http://tools.ietf.org/html/rfc7231#section-6.6.5>