(1)、[root@tf128 sbin]# service php-fpm start
Starting php-fpm [23-Oct-2018 12:31:12] NOTICE: PHP message: PHP Warning: PHP Startup: Invalid library (maybe not a PHP library) ‘/usr/local/php/lib/php/extensions/no-debug-non-zts-20131226/sockets.so’ in Unknown on line 0
Warning: PHP Startup: Invalid library (maybe not a PHP library) ‘/usr/local/php/lib/php/extensions/no-debug-non-zts-20131226/sockets.so’ in Unknown on line 0
[23-Oct-2018 12:31:12] ERROR: unable to bind listening socket for address ‘127.0.0.1:9000’: Address already in use (98)
[23-Oct-2018 12:31:12] ERROR: FPM initialization failed
（2）、[root@tf128 sbin]# netstat |grep 9000
tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 16924/php-fpm: mast
直接reload一下，一般是重新加载配置文件php.ini：
service php-fpm reload