@VisibleForTesting
  public int getQueueUserAclsFailedRetrieved() {
    return numGetQueueUserAclsFailedRetrieved.value();
  }
@Test
  public void testQueueUserAclsFailed() {
    long totalBadBefore = metrics.getQueueUserAclsFailedRetrieved();
    badSubCluster.getQueueUserAcls();
    Assert.assertEquals(totalBadBefore + 1, metrics.getQueueUserAclsFailedRetrieved());
  }