一些运行在Nginx上的网站有时候会出现“502 Bad Gateway”错误,有些时候甚至频繁的出现。以下是小编搜集整理的一些Nginx 502错误的排查方法,供参考:Nginx 502错误的原因比较多,是因为在代理模式下后端服务器出现问题引起的。这些错误一般都不是nginx本身的问题,一定要从后端找原因!Nginx 502的触发条件502错误最通常的出现情况就是后端主机当机。在upstream配置里有这么一项配置:proxy_next_upstream,这个配置指定了nginx在从 Some sites running on Nginx sometimes have “502 Bad Gateway ” errors, sometimes even frequently. The following is a small series of sorting some Nginx 502 error troubleshooting method for reference: Nginx 502 error is more because the back-end server in proxy mode problems caused. These errors are generally not the nginx itself, we must find the reason from the back end! Nginx 502 trigger condition 502 error The most common occurrence is the back-end host machine. In the upstream configuration there is such a configuration: proxy_next_upstream, this configuration specifies the nginx in the from