在升级了php7.2.0版本之后，重新启动php-fpm过程中遇到一个报错。

An another FPM instance seems to already listen on /tmp/php-cgi.sock

# netstat -ant | grep 9000  //查看启动进程，发现没启动成功

我们去查看一下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 = -1listen.allowed_clients = 127.0.0.1listen.owner = wwwlisten.group = www

此时我们需要根据配置文件的listen地址做对应的修改：

# vim /usr/local/nginx/conf/nginx.conf

location ~ [^/]\.php(/|$) {       fastcgi_pass unix:/tmp/php-cgi.sock;    //把127.0.0.1:9000改为此行       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;}

修改完平滑重启nginx，然后启动php-fpm，OK