def __make_writer_request(
            self,
            params=None,
            json=None,
            http_method="POST",
            trace=False):
        '''
        Send request to writer service.
        '''
        request = requests.Request(
            http_method,
            self.writer_url,
            params=params,
            json=json,
            headers={
                'User-Agent': self.user_agent})
        ids = id_gen(str(uuid.uuid4()))
        network_timeouts = self.network_timeouts()
        maintenance_timeouts = self.maintenance_timeouts()
        while True:
            try:
                response = self.__send_single_request(request, ids.next(), trace=trace)
                return response
            except (Timeout, ConnectionError, ProtocolError):
                logger.warn(traceback.format_exc())
                try:
                    timeout = next(network_timeouts)
                    logger.warn(
                        "Network error, will retry in %ss..." %
                        timeout)
                    time.sleep(timeout)
                    continue
                except StopIteration:
                    raise self.NetworkError()
            except self.UnderMaintenance as e:
                try:
                    timeout = next(maintenance_timeouts)
                    logger.warn(
                        "Writer is under maintenance, will retry in %ss..." %
                        timeout)
                    time.sleep(timeout)
                    continue
                except StopIteration:
                    raise e
Send request to writer service.