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服务端采用 Django + Nginx + Gunicorn 部署， 每次访问 /articles/{id} 这个接口时就报 500/502/504 错误。nginx 错误文件：
2018/01/15 16:49:44 [error] 1006#1006: *1274 upstream prematurely closed connection while reading response header from upstream, client: 27.154.27.176, server: waterlaw.cn, request: "GET /articles/6 HTTP/1.1", upstream: "http://unix:/tmp/waterlaw.cn.socket:/articles/6", host: "waterlaw.cn", referrer: "https://waterlaw.cn/" 2018/01/15 17:07:17 [error] 1006#1006: *1338 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 27.154.27.176, server: waterlaw.cn, request: "GET / HTTP/1.1", upstream: "http://unix:/tmp/waterlaw.cn.socket:/", host: "waterlaw.cn" 2018/01/15 17:10:47 [error] 22126#22126: *7 upstream prematurely closed connection while reading response header from upstream, client: 27.154.225.154, server: waterlaw.cn, request: "GET / HTTP/1.1", upstream: "http://unix:/tmp/waterlaw.cn.socket:/", host: "waterlaw.cn" 2018/01/15 17:14:26 [error] 22236#22236: *8 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 27.154.225.154, server: waterlaw.cn, request: "GET / HTTP/1.1", upstream: "http://unix:/tmp/waterlaw.cn.socket/", host: "waterlaw.cn" 2018/01/15 17:16:03 [error] 22236#22236: *8 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 27.154.225.154, server: waterlaw.cn, request: "GET / HTTP/1.1", upstream: "http://unix:/tmp/waterlaw.cn.socket/", host: "waterlaw.cn" 2018/01/15 17:43:44 [error] 22615#22615: *1 upstream prematurely closed connection while reading response header from upstream, client: 27.154.27.176, server: waterlaw.cn, request: "GET /articles/6 HTTP/1.1", upstream: "http://unix:/tmp/waterlaw.cn.socket:/articles/6", host: "waterlaw.cn", referrer: "https://waterlaw.cn/" Gunicorn 控制台的错误日志：
[2018-01-15 17:51:19 +0800] [22183] [CRITICAL] WORKER TIMEOUT (pid:22730)  | 1 alect 2018-01-15 19:34:50 +08:00 upstream 设置的不对吧 |
2 Beebird 2018-01-15 19:47:30 +08:00 django 有日志输出吗？ 有条件的话试试直接访问 django 的监听端口 |
 | 3 beiposhiming 2018-01-15 20:20:55 +08:00 via iPad 想花式 500 ？ 你得跟着 V2EX 多学学 |
 | 4 flipped123 2018-01-16 09:14:27 +08:00 排查两方面，一个关闭防火墙试试，同时注意关闭 selinux 试试。 |
 | 5 justseemore 2018-01-16 09:37:07 +08:00 http://unix:/... 肯定连不上啊。。 |
 | 6 xia0pia0 2018-01-16 10:05:37 +08:00 proxy_pass 配错了吧，upstream 那块的问题 |
 | 7 waterlaw OP 不知道是不是文件句柄太多， 每次修改完都再次开启 gunicorn, 然后开了多个进程。 重启一下突然好了， 想到博客用了结巴分词， 然后缓存的时候占用了 1.5 秒。 |
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