private void loadRequestExecutions() {
    ClusterEntity clusterEntity = getClusterEntity();
    if (!clusterEntity.getRequestScheduleEntities().isEmpty()) {
      for (RequestScheduleEntity scheduleEntity : clusterEntity.getRequestScheduleEntities()) {
        requestExecutions.put(scheduleEntity.getScheduleId(),
            requestExecutionFactory.createExisting(this, scheduleEntity));
      }
    }
  }
Make sure we load all the service host components.
We need this for live status checks.
ambari-server/src/main/java/org/apache/ambari/server/state/cluster/ClusterImpl.java