invalidateStackTrace = XConnectionUtil.getStackTrace(new Exception());
invalidateStackTrace = new ObjectCloseTraceException(); invalidateStackTraceStr = XConnectionUtil.getStackTrace(invalidateStackTrace);
    protected void handleForceClose() throws SQLException {        preparedStatement.close();        associatedConnection = null;        invalid = true;        invalidateStackTrace = XConnectionUtil.getStackTrace(new Exception());    }