docs: @Override
      protected void exportService() throws Exception {
  
          if (streamServer == null) {
              if (serverSocketFactory == null) {
                  serverSocketFactory = ServerSocketFactory.getDefault();
              }
              ServerSocket serverSocket =
                      serverSocketFactory.createServerSocket(port, backlog, InetAddress.getByName(hostName));
              streamServer = new StreamServer(getJsonRpcServer(), maxThreads, serverSocket);
              streamServer.setMaxClientErrors(maxClientErrors);
          }
          streamServer.start();
      }