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job metrics have jobs that finished before they started?

Question asked by shaka on Dec 9, 2013
There are a few job entries in our metrics database that look like this:

    +-----------------------+---------------------------------------------------------------+---------------+----------------+----------------+---------------+---------------+---------------------+---------------------+
    | JOB_ID         | JOB_NAME   | PARENT_JOB_ID | USER_SUBMITTED | TIME_SUBMITTED |TIME_STARTED  | TIME_FINISHED | CLUSTER_ID          | CREATED             |
    +--------------+---------------------------------------------------------------+---------------+----------------+----------------+---------------+---------------+---------------------+---------------------+
    | job_201310221525_1986 | QUERY              | NULL          | user           |  1383047886396 | 1383059338808 | 1383047886430 | xxxxxxxxxxxxxxxxxxx | 2013-10-29 04:58:06 |
    +-----------------------+---------------------------------------------------------------+---------------+----------------+----------------+---------------+---------------+---------------------+---------------------+

and as you can see, the TIME FINISHED is an earlier time than TIME STARTED.

anyone knows what could cause this?

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