nginx 502 bad gateway

我要評(píng)論 2012/11/29 20:51:25 來(lái)源：綠色資源網(wǎng) 編輯：www.dineoutnj.com [大中小] 評(píng)論:0 點(diǎn)擊:227次

我們?cè)谑褂胣ginx的時(shí)候有不少問(wèn)題出現(xiàn)，首先我們就來(lái)解決下nginx 502錯(cuò)誤的問(wèn)題

經(jīng) 過(guò)分析將nginx的error log打開(kāi)，發(fā)現(xiàn)”pstream sent too big header while reading response header from upstream”這樣的錯(cuò)誤提示，查閱了一下資料，大意是nginx緩沖區(qū)有一個(gè)bug造成的,我們網(wǎng)站的頁(yè)面消耗占用緩沖區(qū)可能過(guò)大

我們是nginx反向代理
proxy是nginx作為client轉(zhuǎn)發(fā)時(shí)使用的，如果header過(guò)大，超出了默認(rèn)的1k，就會(huì)引發(fā)上述的upstream sent too big header （說(shuō)白了就是nginx把外部請(qǐng)求給后端apache ，apache返回的header 太大nginx處理不過(guò)來(lái)就導(dǎo)致了。

server {
listen 80;
server_name *.xywy.com ;

large_client_header_buffers 4 16k;

#charset koi8-r;

# access_log off;

location / {

#添加這3行，
                proxy_buffer_size 64k;
                proxy_buffers   32 32k;
                proxy_busy_buffers_size 128k;

          proxy_set_header Host $host;
           proxy_set_header X-Real-IP       $remote_addr;
           proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

set $baiduspider '';

          if ( $http_user_agent ~ Baiduspider) {
              set $baiduspider Baidu;
          }

............

如果是 nginx+PHPcgi 就該

fastcgi_connect_timeout 60;
fastcgi_send_timeout 180;
fastcgi_read_timeout 180;
fastcgi_buffer_size 128k;
fastcgi_buffers 4 256k;
fastcgi_busy_buffers_size 256k;
fastcgi_temp_file_write_size 256k;
fastcgi_intercept_errors on
011/01/07 11:12:57 [error] 10770#0: *38585340 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 116.22.131.154, server: *.xywy.com, request: "GET /ysmp/index.php?did=124994 HTTP/1.0", upstream: "http://127.0.0.1:8080/ysmp/index.php?did=124994", host: "xywy.yn16.com"

后來(lái)原來(lái)那錯(cuò)誤沒(méi)了出了新錯(cuò)誤了 upstream timed out 超時(shí)？

server {
        listen       80;
        server_name *.xywy.com ;
large_client_header_buffers 4 16k;
        client_max_body_size 300m;
        client_body_buffer_size 128k;
        proxy_connect_timeout 600;
        proxy_read_timeout 600;
        proxy_send_timeout 600;
                proxy_buffer_size 64k;
                proxy_buffers   4 32k;
                proxy_busy_buffers_size 64k;