RestAPI /api/jobs always returns 0 for exec_start_time and exec_end_time and exec_interrupt_time fields

GET http://kylin-host:7070/kylin/api/jobs?cubeName=xxx&timeFilter=0&offset=0&limit=10000

[
    {
        "uuid":"a89cf2d4-caaf-21fe-5cb9-63f1725d0e02",
        "last_modified":1549917430155,
        "version":"2.5.2.20500",
        "name":"BUILD CUBE - xxxx- 20190211000000_20190212000000 - GMT+08:00 2019-02-12 04:10:32",
        "type":"BUILD",
        "duration":1583,
        "related_cube":"xxxx",
        "display_cube_name":"xxxx",
        "related_segment":"898fc7c8-5e30-927c-da26-816ab4dbff08",
        "exec_start_time":0,
        "exec_end_time":0,
        "exec_interrupt_time":0,
        "mr_waiting":179,

......

 exec_start_time, exec_end_time and exec_interrupt_time fields always return 0