final protected void initializeWithoutRegisteringInternal() throws IOException {
    // Create a znode under the rootNamespace parent for this instance of the server
    try {
      try {
        zooKeeperClient.create().creatingParentsIfNeeded().forPath(workersPath);
      } catch (NodeExistsException ex) {
        // Ignore - this is expected.
      }
      if (doCheckAcls) {
        try {
          checkAndSetAcls();
        } catch (Exception ex) {
          throw new IOException("Error validating or setting ACLs. " + disableMessage, ex);
        }
      }
    } catch (Exception e) {
      LOG.error("Unable to create a parent znode for the registry", e);
      throw (e instanceof IOException) ? (IOException)e : new IOException(e);
    }
  }
Get the ensemble server addresses from the configuration. The format is: host1:port,
host2:port..

@param conf configuration
llap-client/src/java/org/apache/hadoop/hive/registry/impl/ZkRegistryBase.java