504 Gateway Timeout: Origin vs. Proxy—How to Pinpoint the Culprit
Few errors are as mystifying and frustrating as the 504 Gateway Timeout. It appears seemingly at random, lacks a clear indication of cause, and can stem from multiple sources. This error typically arises when a server acting as a gateway or proxy fails to receive a timely response from an upstream server. The ambiguity lies in determining whether the fault lies with the origin server or the intermediary proxy server. Getting to the root of this issue efficiently is critical to maintaining high availability and optimal user experience.