return new TaskTrackerInfo[0];
  }
  public ClusterMetrics getClusterMetrics() throws IOException,
      InterruptedException {
    YarnClusterMetrics metrics = super.getYarnClusterMetrics();
    ClusterMetrics oldMetrics = new ClusterMetrics(1, 1, 1, 1, 1, 1, 
        metrics.getNumNodeManagers() * 10, metrics.getNumNodeManagers() * 2, 1,
        metrics.getNumNodeManagers(), 0, 0);
    return oldMetrics;
  }