HTTP Status Codes - Online Reference Guide

Reference guide for HTTP status codes. Learn the meaning of 200, 404, 500, and all HTTP codes.

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504server

Gateway Timeout

The server, acting as a gateway or proxy, did not receive a timely response from the upstream server.

Common Causes

Upstream server is too slow, network issues between proxy and upstream, or upstream server is hanging.

How to Fix

Increase proxy timeout settings (e.g., proxy_read_timeout in Nginx). Optimize upstream server performance. Check network connectivity.

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