@Override
  protected void chore() {
    try {
      balancer.updateClusterMetrics(master.getClusterMetricsWithoutCoprocessor());
    } catch (InterruptedIOException e) {
      LOG.warn("Ignoring interruption", e);
    }
  }
Chore that will feed the balancer the cluster status.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/ClusterStatusChore.java