---
set: 5
code: 502
title: Bad Gateway
references:
    "Rails HTTP Status Symbol": ":bad_gateway"
---

The 502 (Bad Gateway) status code indicates that the server, while acting as a
gateway or proxy, received an invalid response from an inbound server it
accessed while attempting to fulfill the request.

Source: [RFC7231 Section 6.6.3][1]

[1]: <http://tools.ietf.org/html/rfc7231#section-6.6.3>