Java应用程序在几天后(8-10天)突然停止

Question

我创建了一个独立的app.This应用程序，每5秒发送一个移动和事件到一个线程(主)和应用程序停止事件请求启动.或者移动请求开始。在下面的请求method.How行中，我可以修复这个错误。

我不能得到任何信息。

当数据库连接和网络连接断开时，我可以处理这个问题。

public void run() {
    while (true) {
        long startTime = System.currentTimeMillis();
        Connection connection = openConnection();
        try {
            mobileEventList = null;
            if (connection != null) {
                mobileEventList = Dao.getMobileEvents(connection);
            }
            if (failEventFlag) {
                if (failMobileEventList != null && failMobileEventList.size() > 0) {
                    mobileEventList.addAll(failMobileEventList);
                    LOGGER.info("Fail Event , failMobileEventList Size->" + mobileEventList.size());
                }
            }

            mobileList = null;
            if (connection != null) {
                mobileList = Dao.getMobiles(username, connection);
            }
            int responseEvent = setLogEvents(endPointEvent);
            int responseMobile = setLogMobile(endPointMobile);
            if (mobileEventList != null && mobileList != null && responseEvent != 0 && responseMobile != 0) {
                if (connection != null) {
                    Dao.updateHeartBeat(appName, connection);
                    LOGGER.info("HeartBeat updated.");
                }
            }
            closeConnection(connection);

        } catch (Exception e) {
            LOGGER.error(e.getMessage());
        }
        long endTime = System.currentTimeMillis();
        LOGGER.info("Gecen milisaniye->" + ((endTime - startTime)));
        if (((endTime - startTime)) < this.repeatTime) {
            try {
                Thread.sleep(this.repeatTime);
            } catch (InterruptedException e) {
                LOGGER.error(e.getMessage());
            }
        }
    }
}

每个getEvents和getMobiles发送请求->

private static int request(String params, String endPoint, boolean isEvent) {

    if (isEvent) {
        LOGGER.info(" Event Request Starting...");
    } else {
        LOGGER.info(" Mobile Request Starting...");
    }

    DataOutputStream wr = null;
    HttpURLConnection conn = null;
    URL url = null;
    int responseCode = 0;
    try {
        url = new URL(endPoint);
        conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "application/json;charset=" + StandardCharsets.UTF_8);
        conn.setUseCaches(false);
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setConnectTimeout(5000);
        conn.connect();
        wr = new DataOutputStream(conn.getOutputStream());
        wr.writeBytes(params);
        wr.flush();
        wr.close();
        responseCode = conn.getResponseCode();
        isFailEvent(responseCode, isEvent);

    } catch (UnsupportedEncodingException e) {
        LOGGER.error(e.getMessage());
    } catch (IOException e) {
        isFailEvent(responseCode, isEvent);
        LOGGER.error(e.getMessage());
    } catch (Throwable e) {
        LOGGER.error(e.getMessage());
    } finally {
        try {
            if (wr != null) {
                wr.close();
            }
            if (conn != null) {
                conn.disconnect();
            }
        } catch (Exception e) {
            LOGGER.error(e.getMessage());
        }
        params = null;
    }

    if (isEvent) {
        LOGGER.info(" Event Request End  Http Code : " + responseCode + " End Point: " + endPoint);
    } else {
        LOGGER.info(" Mobile Request End  Http Code : " + responseCode + " End Point: " + endPoint);
    }

    return responseCode;
}

Answer 1

我们期望post在发送请求时工作，然后在responseCode method.Sometimes responseTime中为HTTPUrlConnection method.Sometimes responseTime中的setDoOutput (true)返回响应30秒，因此setReadTimeOut(0)默认url conenction。有时没有响应程序和可疑程序。因此，我们必须添加类似于以下conn.setReadTimeout(40000);的setReadTimeout参数

 conn.getResponseCode();// stay there