此代碼逐漸消耗內存，從大約130 MB開始（由于依賴性），并在我必須殺死它并重新啟動它（因為服務器內存不足）之前不斷爬升到800 + MB。它與OpenJDK 11一起運行。我有一個舊版本的代碼運行在Java 8服務器上，其內存使用率保持穩定并且永遠不會增加。所以我不確定它是否與新的JDK有關？我在這里修改了相當多的代碼，以確保它盡可能簡單 - 但仍然有問題?；疽c - 它是否每隔幾秒鐘查詢一次數據庫以查找待處理的發票。但是，沒有待處理的發票（日志也證明了這一點），因此它永遠不會進入復雜的代碼位置，而只會每隔幾秒鐘繼續重復一次。public static void main(String[] args) {    ...    final int interval = Constants.INTERVAL;    QuickBooksInvoices qbInvoices = new QuickBooksInvoices(filename);    qbInvoices.testConnection();    log.log(Level.INFO, "Checking invoices with an interval of " + interval + " seconds...");    while (isRunning == true) {        qbInvoices.process();        try {            Thread.sleep(interval * 1000);        } catch (InterruptedException e) {        }    }}public void process() {    errorBuffer.clear();  // These are array lists    successBuffer.clear(); // These are array lists    try (Connection conn = DriverManager.getConnection(dbURI, dbUser, dbPassword)) {        ArrayList<com.xxx.quickbooks.model.wdg.Invoice> a = getInvoices(conn);        OAuthToken token = null;        if (a.size() > 0) {            // Never gets here - no results        }        for (com.xxx.quickbooks.model.wdg.Invoice invoice : a) {            // Never gets here - no results        }    } catch (Exception e) {                writeLog(Level.ERROR, ExceptionUtils.getStackTrace(e));    }}private ArrayList<com.xxx.quickbooks.model.wdg.Invoice> getInvoices(Connection conn) {    ArrayList<com.xxx.quickbooks.model.wdg.Invoice> invoices = new ArrayList<com.xxx.quickbooks.model.wdg.Invoice>();      String sql =         "select " +        "id," +        "type," +        "status," +        "business_partner_id," +        "invoice_number," +        "total," +        "nrc," +        "szrc," +        "trans_ts," +        "warehouse_id," +        "due_date," +        "ref_number," +        "payment_type " +        "FROM dv_invoice " +        "WHERE exported_ts is NULL AND exported_msg is NULL ; ";