def _send_loop(self):
        """Service self._send_queue, sending requests to server"""
        while True:
            message, response_queue = self._send_queue.get()
            if message is self.STOP:
                break
            try:
                self._response_queues.put(response_queue)
                self._socket.send(message)
            except Exception:  # pylint:disable=broad-except
                log.exception("Exception sending message %s", message)