2017-12-12 05:40:32: empty string!!!2017-12-12 05:40:36: empty string!!!2017-12-12 05:40:42: empty string!!!2017-12-12 05:40:43: empty string!!!2017-12-12 05:40:50: empty string!!!2017-12-12 05:40:52: empty string!!!2017-12-12 05:40:57: empty string!!!