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按洞哥你的建议,改后继续 nginx 502 Bad Gateway

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发表于 2009-9-1 15:17:26 | 显示全部楼层 |阅读模式
洞哥的意见如下

改/usr/local/nginx/conf/nginx.conf
中的
events {
    worker_connections  4096;
}

events {
    worker_connections  40960;
}
,然后重启webserver试一下


改后还是间断性出现502 Bad Gateway  。html面正常。

cpu占用不高。流理不大,服务器配置内存2G cpu是酷睿的。型号忘记了。

[ 本帖最后由 hotviews 于 2009-9-1 15:19 编辑 ]
 楼主| 发表于 2009-9-1 16:45:15 | 显示全部楼层
下面是错误日志。大家帮分析一下
 楼主| 发表于 2009-9-1 16:45:49 | 显示全部楼层
2009/09/01 06:42:35 [error] 3660#0: *435598 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=11774&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435600 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14109&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435602 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=11774&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435604 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14109&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435612 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=13995&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435614 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14109&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435616 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14062&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435618 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14198&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435620 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=568&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435622 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14198&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3657#0: *435624 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:35 [error] 3657#0: *435625 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:35 [error] 3657#0: *435626 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435630 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=2&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435632 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435634 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435636 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435638 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435640 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435642 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14198&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435644 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435646 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: bg8.cc, request: "GET /home/api/discuz.php?ac=feed&start=0&limit=12 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "www.bg8.cc"
2009/09/01 06:42:36 [error] 3657#0: *435648 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435650 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:37 [error] 3657#0: *435652 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 116.114.231.136, server: www.chgcw.com, request: "GET /areayy.php?areaid=95&catid=101&page=2 HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "www.chgcw.com", referrer: "http://www.baidu.com/baidu?word=%B0%FC%CD%B7%B8%D8%B3%A6%D2%BD%D4%BA&tn=456net123_pg"
2009/09/01 06:42:56 [error] 3657#0: *435846 open() "/home/ftp/77hr_hr/wwwroot/thread-49993-1-1.html" failed (2: No such file or directory), client: 124.115.0.157, server: www.77hr.cc, request: "GET /thread-49993-1-1.html HTTP/1.1", host: "www.skyward.cn", referrer: "http://www.skyward.cn/thread-49993-1-1.html"
 楼主| 发表于 2009-9-1 16:46:22 | 显示全部楼层
2009/09/01 06:42:35 [error] 3660#0: *435598 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=11774&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435600 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14109&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435602 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=11774&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435604 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14109&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435612 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=13995&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435614 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14109&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435616 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14062&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435618 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14198&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435620 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=568&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3660#0: *435622 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14198&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:35 [error] 3657#0: *435624 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:35 [error] 3657#0: *435625 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:35 [error] 3657#0: *435626 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435630 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=2&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435632 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435634 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435636 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435638 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435640 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435642 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: uc.77hr.com, request: "GET /avatar.php?uid=14198&size=middle&type=virtual&check_file_exists=1&__times__=1 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "uc.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435644 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435646 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: bg8.cc, request: "GET /home/api/discuz.php?ac=feed&start=0&limit=12 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "www.bg8.cc"
2009/09/01 06:42:36 [error] 3657#0: *435648 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:36 [error] 3657#0: *435650 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 125.65.111.26, server: home.77hr.com, request: "GET /api/discuz.php?ac=space&order=updatetime&sc=DESC&start=0&limit=10 HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "home.77hr.com"
2009/09/01 06:42:37 [error] 3657#0: *435652 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 116.114.231.136, server: www.chgcw.com, request: "GET /areayy.php?areaid=95&catid=101&page=2 HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "www.chgcw.com", referrer: "http://www.baidu.com/baidu?word=%B0%FC%CD%B7%B8%D8%B3%A6%D2%BD%D4%BA&tn=456net123_pg"
2009/09/01 06:42:56 [error] 3657#0: *435846 open() "/home/ftp/77hr_hr/wwwroot/thread-49993-1-1.html" failed (2: No such file or directory), client: 124.115.0.157, server: www.77hr.cc, request: "GET /thread-49993-1-1.html HTTP/1.1", host: "www.skyward.cn", referrer: "http://www.skyward.cn/thread-49993-1-1.html"
发表于 2009-9-1 16:55:43 | 显示全部楼层
你把/nginx-start中的28改成60,然后重启webserver试一下
发表于 2009-9-1 17:41:15 | 显示全部楼层
[转]nginx中配置php fastcgi组解决莫名其妙的502 Bad Gateway错误[2009-08-24 21:33:30] 一般nginx搭配php都采用这样的方式:

location ~ \.php$ {
proxy_pass        http://localhost:9000;
fastcgi_param  SCRIPT_FILENAME  /data/_hongdou$fastcgi_script_name;
include        fastcgi_params;
}

这个方式只能连接到一组spawn-fcgi开启的fastcgi,在服务器负载稍高时常常出现502 bad gateway错误。

起先怀疑这是php-cgi的进程开得太少,增加后仍然有反映时常有错,偶然间发现php-cgi会报出这样的错误:

zend_mm_heap corrupted

看来是php-cgi在执行某些代码时有问题,以致于该线程中止。

在服务器上可能还会看到php-cgi进程在不断变少,估计是出现错误的php-cgi的进程自动退出了。

php的问题总是不太容易能解决,所以在nginx方面想想办法,nginx的好处是它总是能爆出一些稀奇古怪的做法出来。

在nginx的proxy中,规避莫名其妙错误的办法无非是proxy到一个upstream的服务器组中,然后配置proxy_next_upstream,让nginx遇到某种错误码时,自动跳到下一个后端上。这样,应用服务器即使不稳定,但是在nginx后面就变成了稳定服务。想到nginx的fastcgi和proxy是一路东西,所以proxy能用的经验,移植到fastcgi也能跑得起来。

照着这个思路,用spawn-fcgi多开同样一组php进程,所不同的仅仅是端口:

spawn-fcgi -a 127.0.0.1 -p 9000 -u nobody -f php-cgi -C 100
spawn-fcgi -a 127.0.0.1 -p 9001 -u nobody -f php-cgi -C 100

然后把fastcgi的这段配置改成用upstream的方式:

upstream backend {
server 127.0.0.1:9000;
server 127.0.0.1:9001;
}

location ~ \.php$ {
fastcgi_pass        backend;
fastcgi_param  SCRIPT_FILENAME  /data/_hongdou$fastcgi_script_name;
include        fastcgi_params;
}

检查配置结果正确,能跑起来;同时在服务器上netstat -n|grep 9000和grep 9001都有记录,证明连接无误;在前台查阅页面,一切运行正常。

这个配置是最简单的配置,既然能连接上upstream,那么很显然upstream的一些东西都可以拿来用,比如ip_hash、weight、max_fails等。

这样的配置在单机下不知能不能共享session,没有测试,如果有问题,可以加上ip_hash,或者配置php把session存进memcached中。

然后就是fastcgi_next_upstream的配置,nginx wiki中没有介绍到这个配置,查了一下,在nginx的CHANGES中有提到,而且出生年月是和proxy_next_upstream一样的。既然如此,那就照proxy_next_upstream一样配吧。一般按默认的值error timeout就可以工作,因为php出现502错误的异常是返回的500错误,所以我把fastcgi_next_upstream定为:

fastcgi_next_upstream error timeout invalid_header http_500;

通过这个配置,就可以基本杜绝任何时常性的500错误,出问题的几率会变小很多,如果客户反映仍然激烈,那么就多增加几组fastcgi进程。

以上配置能够杜绝由于php所引起的“莫名其妙”的时常性的502错误,同时可使nginx搭配php比从前方式更为强悍。假如nginx还是返回502错误,那这次就一定是出现服务器挂掉或其它严重问题的了。
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