for (; cur_time < retryTimes; ++cur_time) {

            try {
                //todo

                return ;

            } catch (Exception e) {

                LOGGER.warn("cannot reach, will retry " + cur_time + " .... " + e.toString());

                try {
                    Thread.sleep(sleepSeconds * 1000);
                } catch (InterruptedException e1) {
                }
            }
        }