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From "Jonathan Eagles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5052) Job History UI and web services confusing job start time and job submit time
Date Wed, 20 Nov 2013 21:38:37 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13828157#comment-13828157
] 

Jonathan Eagles commented on MAPREDUCE-5052:
--------------------------------------------

Hi Chen. Thanks for putting up a patch for this item. Will be very useful to many.
Couple of minor things based on my first pass of reading. Will add more details as I dive
deeper into this.
  - Please update the documentation for the REST api to reflect code changes. Quick scan shows
possible locations of updates
  -- hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/HistoryServerRest.apt.vm
  -- hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/MapredAppMasterRest.apt.vm
  -- hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/ResourceManagerRest.apt.vm
  -- hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/WebServicesIntro.apt.vm
  - Still feel there is confusion about using the term launch time vs start time. Seems there
is already a precedence in RM and AM for the term start time.
  - Assert description mismatch in _Assert.assertEquals("Queue name different after encoding
and decoding", info.getLaunchTime(), parsedInfo.getLaunchTime());_


> 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
>            Assignee: Chen He
>            Priority: Critical
>         Attachments: MAPREDUCE-5052-updated.patch
>
>
> 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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