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 Streamprocess: Login failed (error code: 4) for device <devicename>

Target devices are stuck at booting: Application event log is flooded with StreamProcess Event ID 10 that reads: "Login failed error code: 4 for device targetdevice1: No servers available for disk" Application event log will also have Streamprocess event ID 11's which read: "Detected one or more...

What are Hung Threads and why is the StreamProcess terminating?

On PVS Servers StreamProcess Hung Threads can lead to poor performance, constant target re-connections and even full outages. These Hung Threads are usually detected by looking at the Windows Application Event logs. The following Events will be recorded: Level| Source| Id| Text ---|---|---|---...