We're using QlikView 10.0.9061.7 on Microsoft Windows Server 2003 Enterprise x64 Edition X64 (Microsoft Windows NT 5.2.3790 Service Pack 2), and I'm investigating why our QVWS service mysteriously stopped last night. As part of this, I discovered that
there were no user sessions on Saturday or Sunday, going by the QVS Sessions logs
This is normally caused by someone using the plugin or Open in Server from the developer client and port 4747 is blocked. The connection is trying to switch to tunneling and that is what you see above.