public void killSession(CuratorFramework curator) throws Exception {
    KillSession.kill(curator.getZookeeperClient().getZooKeeper(), curator.getZookeeperClient().getCurrentConnectionString());
  }
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