If you need to restart only the Web application you can do it without risks of loosing guest sessions. Use the following command:
verde-start-tomcat.h restart
If you need to only restart the verdecmd process, just simply kill the current one. The service will automatically start a new one.
If you need to restart the licsrv service, do the same way as for the verdecmd.
When you just restart the CM - you can loose the guest sessions on the VDIs.
If you restart the CM and there's a Candidate all rights get transferred from CM to CMC.
service VERDE restart (or) /usr/lib/verde/bin/
rc.verde restart
But when you have a standalone CM and you restart the Cluster Master, you risk socket losses.