RHV: /var/log/ovirt-engine/engine.log flooded with WARN... There is no host with less than... running guests

Issue

• /var/log/ovirt-engine/engine.log is flooded with:

  2018-05-05 03:26:41,793+02 WARN  [org.ovirt.engine.core.bll.scheduling.policyunits.EvenGuestDistributionBalancePolicyUnit] (DefaultQuartzScheduler3) [3c79e487] There is no host with less than .. running guests
  2018-05-05 03:26:41,793+02 WARN  [org.ovirt.engine.core.bll.scheduling.policyunits.CpuAndMemoryBalancingPolicyUnit] (DefaultQuartzScheduler3) [3c79e487] All candidate hosts have been filtered, can't balance the cluster 'Default' based on the CPU usage, will try memory based approach
  2018-05-05 03:27:41,861+02 WARN  [org.ovirt.engine.core.bll.scheduling.policyunits.EvenGuestDistributionBalancePolicyUnit] (DefaultQuartzScheduler7) [2fd5b167] There is no host with less than .. running guests
  2018-05-05 03:27:41,861+02 WARN  [org.ovirt.engine.core.bll.scheduling.policyunits.CpuAndMemoryBalancingPolicyUnit] (DefaultQuartzScheduler7) [2fd5b167] All candidate hosts have been filtered, can't balance the cluster 'Default' based on the CPU usage, will try memory based approach
  2018-05-05 03:28:41,933+02 WARN  [org.ovirt.engine.core.bll.scheduling.policyunits.EvenGuestDistributionBalancePolicyUnit] (DefaultQuartzScheduler8) [3783cb24] There is no host with less than .. running guests