Hello,
It works But I had to add one more line:
LimitNOFILE=65536
The final file content:
[Unit]
Description=SonarQube service
After=syslog.target network.target
[Service]
Type=forking
ExecStart=/opt/sonar/bin/linux-x86-64/sonar.sh start
ExecStop=/opt/sonar/bin/linux-x86-64/sonar.sh stop
User=sonar
Group=sonar
Restart=always
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target