Overides partition pump on closing.

        :param reason: The reason for the shutdown.
        :type reason: str

async def on_closing_async(self, reason):
        """
        Overides partition pump on closing.

        :param reason: The reason for the shutdown.
        :type reason: str
        """
        self.partition_receiver.eh_partition_pump.set_pump_status("Errored")
        try:
            await self.running
        except TypeError:
            _logger.debug("No partition pump running.")
        except Exception as err:  # pylint: disable=broad-except
            _logger.info("Error on closing partition pump: %r", err)
        await self.clean_up_clients_async()