@Override
    public void run() {
      BSHostStatusCollector collector = new BSHostStatusCollector(requestIdDir,
          sshHostInfo.getHosts());
      collector.run();
      List<BSHostStatus> hostStatus = collector.getHostStatus();
      BootStrapStatus status = new BootStrapStatus();
      status.setHostsStatus(hostStatus);
      status.setLog("");
      status.setStatus(BSStat.RUNNING);
      bsImpl.updateStatus(requestId, status);
    }
Update the gathered data from reading output
ambari-server/src/main/java/org/apache/ambari/server/bootstrap/BSRunner.java