Examples of org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster.wouldLowerAvailability()

    clusterState.put(servers[12], list3); //servers[12], rack3 hosts replica_of_region2
    // create a cluster with the above clusterState
    cluster = new Cluster(clusterState, null, null, rackManager);
    // check whether a move of replica_of_region2 from servers[12],rack3 to servers[0],rack1 would
    // lower the availability
    assertTrue(!cluster.wouldLowerAvailability(hri4, servers[0]));
    // now move region2 from servers[6],rack2 to servers[0],rack1
    cluster.doAction(new MoveRegionAction(2, 2, 0));
    // now repeat check if replica_of_region2 from servers[12],rack3 to servers[0],rack1 would
    // lower the availability
    assertTrue(cluster.wouldLowerAvailability(hri3, servers[0]));

    assertTrue(!cluster.wouldLowerAvailability(hri4, servers[0]));
    // now move region2 from servers[6],rack2 to servers[0],rack1
    cluster.doAction(new MoveRegionAction(2, 2, 0));
    // now repeat check if replica_of_region2 from servers[12],rack3 to servers[0],rack1 would
    // lower the availability
    assertTrue(cluster.wouldLowerAvailability(hri3, servers[0]));
  }


  private List<ServerName> getListOfServerNames(final List<ServerAndLoad> sals) {
    List<ServerName> list = new ArrayList<ServerName>();
    for (ServerAndLoad e : sals) {

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