I'm experiencing QlikView Server in hung state. I'm wondering what could be causing it based on the following errors.
Management Error Type
"System.Net.Sockets.SocketException: A connection attempt failed because the connectred party did not propertly respond after a period of time, or established connection failed because connected host has failed to respond."
The errors you are attaching are only symptomatic of the fact that the QVS service does not respond, either not at all or not fast enough.
You need to find out why QVS does not answer. Start by attaching QVS event, session and performance logs for the time of the issue, and also state some of the server specs, like server memory amount, virtual/physical machine?, cpu core count.