我的服务器在 nginx 代理上运行 Node JS 时出现 502 Bad Gateway 错误
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502 Bad Gateway error for my server running with Node JS on nginx proxy
提问by undefined
I am getting 502 bad gateway error: when I check the nginx error log I find this:
我收到 502 bad gateway 错误：当我检查 nginx 错误日志时，我发现：
2017/05/06 02:36:04 [error] 48176#0: *135 connect() failed (111: Connection refused) while connecting to upstream, client: 10.163.XX.X, server: abc-def-ghi, request: "GET /favicon.ico HTTP/1.1", upstream: "https://127.0.0.1:5300/favicon.ico", host: "hostnname", referrer: "hostname-1
2017/05/06 02:36:04 [错误] 48176#0：*135 连接（）失败（111：连接被拒绝），同时连接到上游，客户端：10.163.XX.X，服务器：abc-def-ghi，请求：“GET /favicon.ico HTTP/1.1”，上游：“ https://127.0.0.1:5300/favicon.ico”，主机：“hostnname”，引用者：“hostname-1”
I searched internet enough but could not find anything. One thing to note here is that, this intermittent error is coming only on a particular page.
我在互联网上搜索了足够多但找不到任何东西。这里要注意的一件事是，这种间歇性错误仅出现在特定页面上。
Could this be a code issue? or nginx configuration issue> Can anyone please help me here.
这可能是代码问题吗？或 nginx 配置问题> 任何人都可以在这里帮助我。
Some of my nginx conf:
我的一些 nginx conf：
upstream node_api_server {
server localhost:5300 fail_timeout=0;
}
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy true;
proxy_read_timeout 5m;
proxy_connect_timeout 5m;
proxy_pass_header Set-Cookie;
proxy_pass https://node_api_server;
proxy_redirect off;
proxy_buffer_size 128k;
proxy_buffers 4 256k;
proxy_busy_buffers_size 256k;
break;
}
采纳答案by robertklep
502 errors are generally caused by NGINX being unable to pass a request to "upstream", in this case your Node.js server (which is also what the error message suggests: "Connection refused"").
502 错误通常是由 NGINX 无法将请求传递到“上游”引起的，在这种情况下是您的 Node.js 服务器（这也是错误消息所暗示的：“连接被拒绝”“）。
It may be crashing and restarting, so check its logfiles to see what's causing the crashes.
它可能会崩溃并重新启动，因此请检查其日志文件以查看导致崩溃的原因。
回答by Win Swarr
We got a 502 due to a path not having the correct case in a require call, in this case the file name. The code executed locally (in VS Code) but not when deployed.
由于路径在 require 调用中没有正确的大小写，我们得到了 502，在这种情况下是文件名。代码在本地（在 VS Code 中）执行，但在部署时不执行。
const repoName = require('../data/reponame'); //This should have been repoName
const repoName = require('../data/reponame'); //这应该是repoName
回答by Dimi Ansari
Simple trick: kill your nginx process and restart your UI
简单的技巧：杀死您的 nginx 进程并重新启动您的 UI
回答by Srinivas
Make sure you are running npm startor the script that runs the application.
确保您正在运行npm start或运行应用程序的脚本。
