Target device cannot access VDisk and boot, Event ID 11 seen on Provisioning server

Some or all target devices cannot access the VDisk at boot - the device will get a boot file but be unable to go further. On the PVS servers: Event id 11 from StreamProcess.exe is seen with the error detail:Detected one or more hung threads...

PVS Servers Show Offline on PVS Console - Event ID 11 - Undefined Database Error

PVS server shows offline in the PVS console, although Streaming service is running on occasion: An error in event viewer: Event ID: 11 – Undefined database error/PVS server status is "Down" This is an internal error. Please contact technical support...