public int getNumReplaceLabelsOnNodesFailedRetrieved() {
    return numReplaceLabelsOnNodesFailedRetrieved.value();
  }
@Test
  public void testReplaceLabelsOnNodesRetrievedFailed() {
    long totalBadBefore = metrics.getNumReplaceLabelsOnNodesFailedRetrieved();
    badSubCluster.getReplaceLabelsOnNodesFailed();
    Assert.assertEquals(totalBadBefore + 1,
        metrics.getNumReplaceLabelsOnNodesFailedRetrieved());
  }