public void setHeartbeatLostStateHosts(int heartbeatLostStateHosts) {
    this.heartbeatLostStateHosts = heartbeatLostStateHosts;
  }
@param heartbeatLostStateHosts number of hosts
                               having host status HEARTBEAT_LOST
ambari-server/src/main/java/org/apache/ambari/server/state/ClusterHealthReport.java