We have a clustered environment consisting of two QV frontend servers (with QVS) and a backend server with QMC. Every time the server vendor (who is hosting the servers) patches the servers with Microsoft windows updated in a closing window, we are experiencing that all QV servers are rebooted and all QV services on all three servers are running, but the whole system is not working:
1- Accesspoints are not available (error message: No server)
2- scheduled tasks are not running (error message: SE_LOG: CQvXmlInterfaceRequestHandler - Catch: errId(36). Ino(-1). Fno(90))
In QMC we see the "Off duty" message for QVS servers in the Services tab.
It seems that all servers and services are running, but servers are not communicating to each other or cannot find each other!
We are running: Windows 2012 R2 and QlikView 11.2 SR11
We are observing this error two under similar circumstances.
Our Windows SAs perform a routine reboot of the servers at weekend and these messages appear after that.
Fortunately, we have scheduled task to restart all QlikView services in time for the start of the working week. This seems to clear the problem. Perhaps you could try a restart of all QlikView services sometime after the server rebooting is all clear and validated.
We will continue to research the underlying cause and how to configure a clean server reboot that leaves QlikView functioning.