code: @Override
    public void queryError(WebSocket session,
                           HeadersAmp headers,
                           String to,
                           long qid,
                           Throwable exn)
      throws IOException
    {
      /*
      try (Writer out = session.getBasicRemote().getSendWriter()) {
        init(out);
        queryError(headers, to, qid, exn);
      }
      */
    }
docs: Sends a message to a given address