[Service]
Type=forking
Restart=no
IgnoreSIGPIPE=no
GuessMainPID=no
ExecStart=/opt/app/appl_init.d start
ExecStop=/opt/app/appl_init.d stop
TimeoutSec=infinity

Job for app.service failed because a fatal signal was delivered to the control process. See "systemctl status app.service" and "journalctl -xe" for details

● app.service - ApplicationTest
   Loaded: loaded (/opt/app/appl_init.d; enabled; vendor preset: disabled)
   Active: failed (Result: signal) since Tue 2017-03-21 01:55:22 EDT; 1min 4s ago
     Docs: man:app(8)
  Process: 4126 ExecStart=/opt/app/appl_init.d start (code=killed, signal=KILL)

Mar 21 01:55:22 centosvm systemd[1]: Starting ApplicationTest...
Mar 21 01:55:22 centosvm systemd[1]: app.service start operation timed out. Terminating.
Mar 21 01:55:22 centosvm systemd[1]: app.service stop-final-sigterm timed out. Killing.
Mar 21 01:55:22 centosvm systemd[1]: app.service: control process exited, code=killed status=9
Mar 21 01:55:22 centosvm systemd[1]: Failed to start ApplicationTest.
Mar 21 01:55:22 centosvm systemd[1]: Unit app.service entered failed state.
Mar 21 01:55:22 centosvm systemd[1]: app.service failed.