nginx [error] 15644#0: *112680 recv() failed (104: Connection reset by peer) while reading response

参考地址   https://serverfault.com/questions/543999/nginx-errors-recv-failed-104-connection-reset-by-peer-while-reading-respon/544106

网站登录的时候今天突然报出nginx m502的错误 ，  平均请求3次就有一次这种情况 ，查看错误日志

2017/09/15 09:59:46 [error] 15644#0:
*112680 recv() failed (104: Connection reset by peer) while reading response header from upstream,
client: 172.18.19.201, server: bmp-mgmt-liusen.dianhua.cn,
request: "GET /System/Auth/validate.html?ticket=b3b0acbd91fb70c155dbf7d9e6e74729 HTTP/1.1",
upstream: "fastcgi://127.0.0.1:9000", host: "bmp-mgmt-liusen.dianhua.cn",
referrer: "http://bmp-mgmt-liusen.dianhua.cn/System/Auth/login.html?from=%2FHome%2FIndex%2Findex.html

.nginx 没有收到请求

recv() failed
-> nginx failed

(104: Connection reset by peer) while reading response header from upstream,
-> no complete answer, or no answer at all
upstream: "fastcgi://127.0.0.1:9000",
-> who is he, who failed???

重启  php-fpm 之后 就ok 了 ，后续继续观察