@Ignore("HIVE-23564")
  @Test
  public void testConcurrencyNoFallback() throws Exception {
    concurrencyTest(100, false);
  }
See SlotZNode; some tests (and the setup) are c/p-ed or modified from Curator.
llap-client/src/test/org/apache/hadoop/hive/llap/registry/impl/TestSlotZnode.java