本篇文章来源于 Linux公社网站(www.linuxidc.com)  原文链接：http://www.linuxidc.com/Linux/2012-11/75149.htm

L同学又一次把socket连接往错误的端口上连了。

搬完办公室，D同学说端口有点乱，一台开发机上3个游戏，端口范围不规范，于是就定了下各个游戏的端口区间，负载其中一款游戏的L同学就开始修改端口了。

修改完端口后游戏进不去了。

表现为：

前端一连接就报错

后端接受到了请求并处理了请求

我在输出处打了下log，输出的数据是对的

nginx的error log如下：

recv() failed (104: Connection reset by peer) while reading response header from upstream

当时没有去看php-fpm的log，其实应该先去检查下php-fpm的错误log，后来想起后去看了下

Nov 29 12:19:04.040453 [NOTICE] [pool www] child 29815 started

Nov 29 12:20:32.604920 [WARNING] [pool www] child 29785 exited on signal 11 (SIGSEGV) after 246.354264 seconds from start

Nov 29 12:20:32.605383 [NOTICE] [pool www] child 29817 started

Nov 29 12:20:35.668969 [WARNING] [pool www] child 29815 exited on signal 11 (SIGSEGV) after 91.628524 seconds from start

Nov 29 12:20:35.669312 [NOTICE] [pool www] child 29825 started

Nov 29 12:21:45.068408 [WARNING] [pool www] child 29825 exited on signal 11 (SIGSEGV) after 69.399102 seconds from start

Nov 29 12:21:45.068786 [NOTICE] [pool www] child 29836 started

Nov 29 13:00:56.132529 [WARNING] [pool www] child 29817 exited on signal 11 (SIGSEGV) after 2423.527159 seconds from start

Nov 29 13:00:56.132676 [NOTICE] [pool www] child 30046 started

Nov 29 13:01:54.055862 [WARNING] [pool www] child 29836 exited on signal 11 (SIGSEGV) after 2408.987081 seconds from start

Nov 29 13:01:54.056373 [NOTICE] [pool www] child 30060 started

Nov 29 13:02:02.142301 [WARNING] [pool www] child 30046 exited on signal 11 (SIGSEGV) after 66.009642 seconds from start

Nov 29 13:02:02.142795 [NOTICE] [pool www] child 30061 started

Nov 29 13:02:02.925481 [WARNING] [pool www] child 29652 exited on signal 11 (SIGSEGV) after 2750.991891 seconds from start

Nov 29 13:02:02.926067 [NOTICE] [pool www] child 30062 started

Nov 29 13:03:20.960769 [WARNING] [pool www] child 30062 exited on signal 11 (SIGSEGV) after 78.034715 seconds from start

Nov 29 13:03:20.961215 [NOTICE] [pool www] child 30091 started

php worker进程频繁地挂掉和拉起

解决办法：

修改php-fpm配置，只起一个worker进程

kill -USR2 php-fpm_master_pid 重启php-fpm

strace -p only_php_worker_pid

然后发现php worker进程在connect某个端口后就挂掉了

一问L同学这个端口是干嘛的，然后他恍然大悟，哦。。。。。。

原因是没有对redis的pconnect的返回值做判断，然后直接lpush，导致php worker进程直接core掉。

本篇文章来源于 Linux公社网站(www.linuxidc.com)  原文链接：http://www.linuxidc.com/Linux/2012-11/75149.htm