systemd 里 service 启动 PHP -fpm 90 秒后终止，是怎么回事

文件 /etc/systemd/system/php53-fpm.service

[Unit]
Description=The PHP53 FastCGI Process Manager
After=syslog.target network.target

[Service]
Type=notify
PIDFile=/usr/local/php53/var/run/php53-fpm.pid
EnvironmentFile=/usr/local/php53/etc/sysconfig/php53-fpm
ExecStart=/usr/local/php53/sbin/php-fpm -c /usr/local/php53/etc/php.ini -y /usr/local/php53/etc/php-fpm.conf --nodaemonize
ExecReload=/bin/kill -USR2 $MAINPID
PrivateTmp=true

[Install]
WantedBy=multi-user.target

----------------

文件 /usr/local/php53/etc/php-fpm.conf
[global]
pid = /usr/local/php53/var/run/php53-fpm.pid
error_log = /usr/local/php53/var/log/php-fpm.log
; Pool Definitions ;
[www53]
user = nginx
group = nginx
listen = /usr/local/php53/var/run/php-fpm.sock
listen.owner = nobody
listen.group = nobody

日志

Jul 14 01:38:10 lasv5 systemd[1]: Starting The PHP53 FastCGI Process Manager...
Jul 14 01:38:10 lasv5 php-fpm[21696]: [14-Jul-2019 01:38:10] NOTICE: fpm is running, pid 21696
Jul 14 01:38:10 lasv5 php-fpm[21696]: [14-Jul-2019 01:38:10] NOTICE: ready to handle connections


Jul 14 01:39:40 lasv5 systemd[1]: php53-fpm.service start operation timed out. Terminating.
Jul 14 01:39:40 lasv5 php-fpm[21696]: [14-Jul-2019 01:39:40] NOTICE: Terminating ...
Jul 14 01:39:40 lasv5 php-fpm[21696]: [14-Jul-2019 01:39:40] NOTICE: exiting, bye-bye!
Jul 14 01:39:40 lasv5 systemd[1]: Failed to start The PHP53 FastCGI Process Manager.
Jul 14 01:39:40 lasv5 systemd[1]: Unit php53-fpm.service entered failed state.
Jul 14 01:39:40 lasv5 systemd[1]: php53-fpm.service failed.