关于php -fpm 出现127.0.0.1:9000已经被占用

今天安装启动PHP时出现下面的错误：[root@lnmp01 etc]# /application/php/sbin/php-fpm
错误：
[03-Aug-2017 21:30:29] ERROR: failed to open error_log (/app/logs/php-fpm.log): No such file or directory (2)
[03-Aug-2017 21:30:29] ERROR: failed to post process the configuration
[03-Aug-2017 21:30:29] ERROR: FPM initialization failed

解决方法：
[root@lnmp01 etc]# netstat -lntup | grep 9000
tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 12810/php-fpm
[root@lnmp01 etc]# killall php-fpm

再次启动未报错
[root@lnmp01 etc]# /application/php/sbin/php-fpm
[root@lnmp01 etc]#

[root@lnmp01 etc]# ps -ef|grep php-fpm
root 12885 1 0 21:33 ? 00:00:00 php-fpm: master process (/application/php5.3.27/etc/php-fpm.conf)
nginx 12886 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12887 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12888 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12889 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12890 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12891 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12892 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12893 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12894 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12895 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12896 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12897 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12898 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12899 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12900 12885 0 21:33 ? 00:00:00 php-fpm: pool www
nginx 12901 12885 0 21:33 ? 00:00:00 php-fpm: pool www
root 12915 1600 0 21:44 pts/0 00:00:00 grep php-fpm