php – nginx错误“recv()失败(104：对等连接重置)从上游读取响应头”

我有一台服务器工作正常,直到2013年10月3日上午10:50,它开始间歇性地向客户端返回“502 Bad Gateway”错误.

大约有五分之四的浏览器请求成功,但大约五分之一的用户失败了502.

nginx错误日志包含数百个这样的错误;

2013/10/05 06:28:17 [error] 3111#0: *54528 recv() failed (104: Connection reset by peer) while reading response header from upstream,client: 66.249.66.75,server: www.bec-components.co.uk  request: ""GET /?_n=Fridgefreezer/Hotpoint/8591P;_i=x8078 HTTP/1.1",upstream: "fastcgi://127.0.0.1:9000",host: "www.bec-components.co.uk"

但是PHP错误日志不包含任何匹配错误.

有没有办法让PHP给我更多关于它为什么重置连接的信息？

这是nginx.conf;

user              www-data;
worker_processes  4;
error_log         /var/log/nginx/error.log;
pid               /var/run/nginx.pid;

events {
   worker_connections  1024;
}

http {
  include          /etc/nginx/mime.types;
  access_log       /var/log/nginx/access.log;

  sendfile               on;
  keepalive_timeout      30;
  tcp_nodelay            on;
  client_max_body_size   100m;

  gzip         on;
  gzip_types   text/plain application/xml text/javascript application/x-javascript text/css;
  gzip_disable "MSIE [1-6]\.(?!.*SV1)";

  include /gvol/sites/*/nginx.conf;

}

这是该网站的.conf;

server {

  server_name   www.bec-components.co.uk bec3.uk.to bec4.uk.to bec.home;
  root          /gvol/sites/bec/www/;
  index         index.php index.html;

  location ~ \.(js|css|png|jpg|jpeg|gif|ico)${
    expires        2592000;   # 30 days
    log_not_found  off;
  }

  ## Trigger client to download instead of display '.xml' files.
  location ~ \.xml${
    add_header Content-disposition "attachment; filename=$1";
  }

   location ~ \.php${
      fastcgi_read_timeout  3600;
      include               /etc/nginx/fastcgi_params;
      keepalive_timeout     0;
      fastcgi_param         SCRIPT_FILENAME  $document_root$fastcgi_script_name;
      fastcgi_pass          127.0.0.1:9000;
      fastcgi_index         index.php;
   }
}

## bec-components.co.uk ##
server {
   server_name   bec-components.co.uk;
   rewrite       ^/(.*) http://www.bec-components.co.uk$1 permanent;
}

如果我的网络服务器告诉我,我总是相信：502 Bad Gateway

>你的fastcgi / nginx进程的正常运行时间是多少？
>你监控网络连接？
>你能否确认/否认当天的访客数量变化？

这是什么意思：

> nginx无法访问fastcgi-process;要么减慢要么根本不对应.坏网关意味着：nginx不能fastcgi_pass到那个定义的资源127.0.0.1:9000;在那个非常具体的时刻.
>您的初始错误日志告诉所有：

.

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???

从我有限的pov我建议：

>重启你的fastcgi_process / server>检查您的访问日志>启用debug-log