Red Hat Cluster suite: VM service takes a long time to live migrate

Issue

• We have a 2 node cluster, while migrating VMs from one node to another it was found that 1 VM is taking a considerably longer time to LIVE migrate than the other VMs. The VM is in a paused state while this happens for approx 15 minutes whereas another vm takes approx 30 secs.

• Also, the affected VM for which LIVE migration is taking too much time is serving as a RHEV-M server for another RHEV setup.

  //Timestamps when RHEV-M VM migration was started:
  Jan 19 17:02:28 node1 rgmanager[5394]: Migrating vm:rhev-m01 to better node node2
  Jan 19 17:02:28 node1 rgmanager[5394]: Migrating vm:rhev-m01 to node2
  [...]
  
  //Timestamps when RHEV-M VM migration was completed (after ~15 minutes):
  Jan 19 17:17:35 node1 rgmanager[5394]: Migration of vm:rhev-m01 to node2 completed
  [...]