@Override
    public void stateChanged(final CuratorFramework curatorFramework, final ConnectionState connectionState) {
      LOG.info("Connection state change notification received. State: {}", connectionState);
    }
Kill query coordination service.
When service discovery is enabled a local kill query can request a kill
on every other HS2 server with the queryId or queryTag and wait for confirmation on denial.
The communication is done through Zookeeper.
service/src/java/org/apache/hive/service/server/KillQueryZookeeperManager.java