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domain	kuaxintong.com
summary	Okay, here’s a summary of the content from the "502 Bad Gateway openresty" website: The page explains the 502 Bad Gateway error, detailing its origin and how it manifests specifically within an OpenResty environment. It clarifies that a 502 Bad Gateway means the OpenResty server, acting as a reverse proxy, couldn't get a valid response from the backend server it was trying to reach. It outlines common causes related to backend server downtime, network connectivity problems, or misconfigured backend services. The page then provides troubleshooting steps, including checking backend server status, reviewing OpenResty configuration (like timeouts and proxy settings), examining network latency, and utilizing OpenResty’s built-in diagnostic tools (like `ngx_http_upstream_module` logging). It stresses the importance of identifying the root cause within the backend system, as the OpenResty setup is simply forwarding requests and reporting the issue.
title	502 Bad Gateway
description	502 Bad Gateway
keywords	gateway
upstreams
downstreams
nslookup	A 159.75.173.186
created	2025-07-21
updated	2025-10-23
summarized	2026-02-07