virt-manager loses connection to the host with 'connection closed due to keepalive timeout'

Solution Verified - Updated -

Issue

  • Connect to a particular host, 30 seconds after it is back to "Not Connected".
  • All other connected hosts all go back to "Not Connected".
  • Problem happens both remotely and locally.
  • Problem only happens with specific host.

Environment

  • Red Hat Enterprise Linux 7
    • virt-manager-1.5.0-1.el7.noarch
    • libvirt-4.5.0-10.el7_6.6.x86_64

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