redis server "online" key value is not entered

[rlarmsqn]

The "online" key value is not entered in the redis server, so when running the mission, "The device is offline, pleas try again later." An error occurs. Why can't I register online with redis? HMS continues to fly through mqtt

 @Transactional(isolation = Isolation.READ_UNCOMMITTED)
    @Override
    public TopicRequestsResponse<MqttReply<FlighttaskResourceGetResponse>> flighttaskResourceGet(TopicRequestsRequest<FlighttaskResourceGetRequest> response, MessageHeaders headers) {
        String jobId = response.getData().getFlightId();

        Optional<DeviceDTO> deviceOpt = deviceRedisService.getDeviceOnline(response.getGateway());
        if (deviceOpt.isEmpty()) {
            log.error("The device is offline, please try again later.");
            return new TopicRequestsResponse().setData(MqttReply.error(CommonErrorEnum.DEVICE_OFFLINE));
        }
        Optional<WaylineJobDTO> waylineJobOpt = waylineJobService.getJobByJobId(deviceOpt.get().getWorkspaceId(), jobId);
        if (waylineJobOpt.isEmpty()) {
            log.error("The wayline job does not exist.");
            return new TopicRequestsResponse().setData(MqttReply.error(CommonErrorEnum.ILLEGAL_ARGUMENT));
        }

        WaylineJobDTO waylineJob = waylineJobOpt.get();

        // get wayline file
        Optional<GetWaylineListResponse> waylineFile = waylineFileService.getWaylineByWaylineId(waylineJob.getWorkspaceId(), waylineJob.getFileId());
        if (waylineFile.isEmpty()) {
            log.error("The wayline file does not exist.");
            return new TopicRequestsResponse().setData(MqttReply.error(CommonErrorEnum.ILLEGAL_ARGUMENT));
        }
        // get file url
        try {
            URL url = waylineFileService.getObjectUrl(waylineJob.getWorkspaceId(), waylineFile.get().getId());
            return new TopicRequestsResponse<MqttReply<FlighttaskResourceGetResponse>>().setData(
                    MqttReply.success(new FlighttaskResourceGetResponse()
                            .setFile(new FlighttaskFile()
                                    .setUrl(url.toString())
                                    .setFingerprint(waylineFile.get().getSign()))));
        } catch (SQLException | NullPointerException e) {
            e.printStackTrace();
            return new TopicRequestsResponse().setData(MqttReply.error(CommonErrorEnum.SYSTEM_ERROR));
        }
    }