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我有一个自定义的 systemd “.service” 文件，比如这个：

[Unit]
Description=MyStuff
After=syslog.target
After=network.target
After=local-fs.target
After=remote-fs.target

[Service]
Type=simple
User=root
Group=root
ExecStart=/usr/local/MyStuff/start
ExecReload=/bin/kill $MAINPID && /usr/bin/cat /var/run/MyStuff.pid | /usr/bin/xargs --no-run-if-empty /bin/kill
ExecStop=/bin/kill $MAINPID && /usr/bin/cat /var/run/MyStuff.pid | /usr/bin/xargs --no-run-if-empty /bin/kill
ExecStartPost=/usr/local/MyStuff/after_start.sh
PIDFile=/var/run/MyStuff.pid
#RemainAfterExit=yes
TimeoutSec=300
Restart=always
RestartSec=10

[Install]
WantedBy=multi-user.target

直到几分钟前它工作得很好。一个systemctl stop MyStuff这样挂的：

[root@Live-1 ffmpeg]# systemctl status WowzaStreamingEngine
● MyStuff.service - MyStuff
   Loaded: loaded (/usr/lib/systemd/system/MyStuff.service; enabled; vendor preset: disabled)
   Active: deactivating (final-sigkill) (Result: timeout) since vie 2017-07-28 11:12:23 -03; 23min ago
Main PID: 25149
CGroup: /system.slice/MyStuff.service

jul 28 11:12:23 Live-1 kill[10382]: kill: cannot find process "/usr/bin/cat"
jul 28 11:12:23 Live-1 kill[10382]: kill: cannot find process "/var/run/MyStuff.pid"
jul 28 11:12:23 Live-1 kill[10382]: kill: cannot find process "|"
jul 28 11:12:23 Live-1 kill[10382]: kill: cannot find process "/usr/bin/xargs"
jul 28 11:12:23 Live-1 kill[10382]: kill: cannot find process "--no-run-if-empty"
jul 28 11:12:23 Live-1 kill[10382]: kill: cannot find process "/bin/kill"
jul 28 11:12:23 Live-1 systemd[1]: MyStuff.service: control process exited, code=exited status=1
jul 28 11:17:24 Live-1 systemd[1]: MyStuff.service stop-sigterm timed out. Killing.
jul 28 11:22:24 Live-1 systemd[1]: MyStuff.service still around after SIGKILL. Ignoring.
jul 28 11:31:22 Live-1 systemd[1]: MyStuff.service stop-final-sigterm timed out. Killing.

我知道那里报告了错误。那不是问题；我不是在问那些错误。问题是：systemd/systemctl 在该状态下挂起，我无法执行启动/停止/重新启动操作，因为它们都一直在等待。

我需要知道的是一种绕过该状态的方法。这次我只是重新启动了服务器，因为它是开发环境。但我不能在生产上就这样处理。

所以：当 systemd/systemctl 以这种方式挂起时，我该怎么做才能在不重新启动服务器的情况下从这种状态恢复我的服务？

提前致谢。

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