@VisibleForTesting
  public int getGetClusterNodeLabelsFailedRetrieved() {
    return numGetClusterNodeLabelsFailedRetrieved.value();
  }
@Test
  public void testClusterNodeLabelsFailed() {
    long totalBadBefore = metrics.getGetClusterNodeLabelsFailedRetrieved();
    badSubCluster.getClusterNodeLabels();
    Assert.assertEquals(totalBadBefore + 1, metrics.getGetClusterNodeLabelsFailedRetrieved());
  }