Description of problem:
poller.py checks for running libvirtd with following command:

 if (subprocess.call(['/sbin/service','libvirtd','status'],

on contemporary Linux systems, this has a side effect of pulling logs to display for administration.  This is completely unnecessary in script usage.
Above check should be replaced by running:

 systemctl is-active libvirtd

Or even using D-Bus interface of systemd directly, without forking external program.

Version-Release number of selected component (if applicable):
rhn-virtualization-host-5.4.55-1.fc22.noarch