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From "Kendall Thrapp (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5052) Job History UI and web services confusing job start time and job submit time
Date Thu, 07 Mar 2013 17:39:11 GMT
Kendall Thrapp created MAPREDUCE-5052:
-----------------------------------------

             Summary: Job History UI and web services confusing job start time and job submit
time
                 Key: MAPREDUCE-5052
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5052
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: jobhistoryserver, webapps
    Affects Versions: 0.23.6
            Reporter: Kendall Thrapp


The "Start Time" column shown on Job History server's main webpage (http://<host>:<port>/jobhistory)
is actually showing the *submit* time for jobs.  However, when you drill down to an individual
job's page, there the "Start Time" really does refer to when the job actually started.  

This also true for the web services REST API, where the Jobs listing returns the submit times
as "startTime", but the single Job API returns the start time as "startTime".

The two different times being referred to by the same name is confusing.  However, it is useful
to have both times, as the difference between the submit time and start time can show how
long a job was stuck waiting in a queue.  The column on the main job history page should be
changed to "Submit Time" and the individual job's page should show both the submit time and
start time.  The web services REST API should be updated with these changes as well.

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