You may have to restart a service instance to have a configuration change take effect. For example, you may choose to change your log level for a service. You can restart any service instance through the Platform Management Console.
Restarting a service instance restarts all service instances on the same host (if there are more than one). The system chooses the best host to start the service on again; the system may or may not start the service on the same host as before.
You cannot restart the WEBGUI service instance.
You can restart service instances with the states Start, Run, and Finish.