百炼api调用报错 network error

集成百炼大模型api到spring boot项目，使用websocket实现流式输出，项目启动后调用多轮对话都能够正常进行，保持不调用状态，过5分钟左右再次调用时会报错 Exception: {"statusCode":-1,"message":"Get response failed!","code":"network error","isJson":false}，重启整个项目后又能正常调用，能够稳定复现，能保证网络没有问题，请问这是什么情况？

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Override
    public void askQuestion(WebSocketSession session, String question) {
        try {
            callWithSession(session,question, appId);
        }  catch (ApiException | NoApiKeyException | InputRequiredException e) {
            System.out.printf("Exception: %s", e.getMessage());
        }
    }

    public void callWithSession(WebSocketSession session, String question)
            throws ApiException, NoApiKeyException, InputRequiredException {

        ApplicationParam param = ApplicationParam.builder()
                .appId(configAppId)
                .prompt(question)
                .incrementalOutput(true)
                .build();

        // 获取多轮对话sessionId
        String key = "convercation_session:" + session.getId() ;
        String sessionId = redisTemplate.opsForValue().get(key);
        if(StringUtils.isNotEmpty(sessionId)){
            // 携带sessionId 实现多轮对话
            param.setSessionId(sessionId);
        }
        Application application = new Application();

        Flowable<ApplicationResult> result = application.streamCall(param);

        result.blockingForEach(data -> {
            session.sendMessage(new TextMessage(JsonUtils.toJson(data)));
            if(!data.getOutput().getFinishReason().equals("null") && !data.getOutput().getFinishReason().equals(null) && StringUtils.isNotEmpty(data.getOutput().getFinishReason())){
                // 全部的回答已经完成
                System.out.printf("requestId: %s, text: %s, finishReason: %s, sessionId: %s\n",
                        data.getRequestId(), data.getOutput().getText(), data.getOutput().getFinishReason(),data.getOutput().getSessionId());
                // 删除之前的验证码
                String delKey = "convercation_session:" + session.getId();
                redisTemplate.delete(delKey);
                // 存储多轮对话sessionId
                String addkey = "convercation_session:" + session.getId();
                redisTemplate.opsForValue().set(addkey, data.getOutput().getSessionId(), 60, TimeUnit.MINUTES);
            }
        });


    }