private String getServerHost() {
    if (hiveServer2 == null) {
      return "";
    }
    try {
      return removeDelimiter(hiveServer2.getServerInstanceURI());
    } catch (Exception e) {
      LOG.error("Unable to determine the server host", e);
      return "";
    }
  }
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