@JsonProperty(HOST_HOST_STATE_UNHEALTHY)
  @ApiModelProperty(name = HOST_HOST_STATE_UNHEALTHY)
  public int getUnhealthyStateHosts() {
    return unhealthyStateHosts;
  }
@return number of hosts having host state UNHEALTHY
ambari-server/src/main/java/org/apache/ambari/server/state/ClusterHealthReport.java