Kendall Thrapp created MAPREDUCE-5052:
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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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