After installing sequenceserver, this method has worked for me instead of the upstart script:
Step1)
cd /etc/systemd/system
Step2)
sudo nano sequenceserver.service
Step3)
[Unit]
Description = running sequenceserver at startup
After = network.target
[Service]
ExecStart = /usr/local/bin/sequenceserver
User=
[Install]
WantedBy = multi-user.target
Step4)
sudo systemctl enable sequenceserver.service
sudo systemctl start sequenceserver.service
sudo systemctl status sequenceserver.service
Hope it helps,
Cheers