在升級了php7.2.0版本之后，重新啟動php-fpm過程中遇到一個報錯。
An another FPM instance seems to already listen on /tmp/php-cgi.sock
# netstat -ant | grep 9000 //查看啟動進程，發現沒啟動成功
我們去查看一下php-fpm.conf里面的配置：
# vim /usr/local/php/etc/php-fpm.conf
[www] listen = /tmp/php-cgi.sock //注意
listen.backlog = -1 listen.allowed_clients = 127.0.0.1 listen.owner = www listen.group = www
此時我們需要根據配置文件的listen地址做對應的修改：
# vim /usr/local/nginx/conf/nginx.conf
location ~ [^/]\.php(/|$) { fastcgi_pass unix:/tmp/php-cgi.sock; //把127.0.0.1:9000改為此行
fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } location / { root html; index index.php index.html index.htm; }
修改完平滑重啟nginx，然后啟動php-fpm，OK