nginx下php頻繁卡死502

解決：[WARNING] fpm_children_bury(), line 215: child 2736 (pool default) exited on signal 15 SIGTERM after 59.588363 seconds from start

試用Nginx + PHP FastCGI 作WEB服務器，運行了幾個月的時間，煩惱的是常常碰到Nginx 502 Bad Gateway 這個問題。

參考了不少修改辦法，這個502的問題一直存在，今天打算重裝PHP FastCGI到PHP的安裝目錄裏一看，發現PHP的日誌文件已經有幾十M的大小，打開一看，結果基本所有都是一下的錯誤：

 

Jan 11 08:54:01.164292 [NOTICE] fpm_children_make(), line 352: child 10088 (pool default) started

Jan 11 08:54:01.164325 [WARNING] fpm_children_bury(), line 215: child 7985 (pool default) exited on signal 15 SIGTERM after 63.778601 seconds from start

Jan 11 08:54:01.165485 [NOTICE] fpm_children_make(), line 352: child 10089 (pool default) started

Jan 11 08:54:01.165514 [WARNING] fpm_children_bury(), line 215: child 7999 (pool default) exited on signal 15 SIGTERM after 60.297326 seconds from start

Jan 11 08:54:01.166696 [NOTICE] fpm_children_make(), line 352: child 10090 (pool default) started

Jan 11 08:54:01.166727 [WARNING] fpm_children_bury(), line 215: child 8000 (pool default) exited on signal 15 SIGTERM after 60.296946 seconds from start

Jan 11 08:54:01.167855 [NOTICE] fpm_children_make(), line 352: child 10091 (pool default) started

Jan 12 04:00:50.443884 [NOTICE] fpm_children_make(), line 352: child 10127 (pool default) started

Jan 12 04:00:50.443917 [NOTICE] fpm_event_loop(), line 107: libevent: entering main loop

Jan 12 12:05:08.425141 [WARNING] fpm_request_check_timed_out(), line 158: child 10120, script '/home/htdocs/www/index.php' (pool default) execution timed out (30.051306 sec), terminating

 

 

查過網上的資源，基本都是認爲是php線程打開文件句柄受限致使的錯誤。具體的解決的辦法以下：

 

一、提高服務器的文件句柄打開打開

/etc/security/limits.conf : (增長)

*    soft    nofile    51200

*    hard    nofile    51200

# vi /etc/security/limits.conf 加上
* soft nofile 51200
* hard nofile 51200

 

二、提高nginx的進程文件打開數

 

nginx.conf : worker_rlimit_nofile 51200;

 

三、修改php-fpm.conf文件，主要須要修改2處。

 

命令 ulimit -n 查看限制的打開文件數，php-fpm.conf 中的選項rlimit_files 確保和此數值一致。

 

 <value name="max_requests">10240</value>

 

<value name="rlimit_files">51200</value>

 

四、

# vi /etc/sysctl.conf 
底部添加
fs.file-max=51200

完成以上修改，重啓PHP，警告信息再也沒了。

 

世界今後安寧，502 Bad Gateway 沒有了。