private void close() {
    if (serviceClient != null) {
      serviceClient.stop();
    }
    if (llapRegistry != null) {
      llapRegistry.stop();
    }
  }
Populate additional information for containers from the LLAP registry. Must be invoked
after YARN Service status and diagnostics.
@return an ExitCode. An ExitCode other than ExitCode.SUCCESS implies future progress not possible
@throws LlapStatusCliException
llap-server/src/java/org/apache/hadoop/hive/llap/cli/status/LlapStatusServiceDriver.java