[jira] Commented: (HADOOP-2086) ability to add dependencies to a job after construction

["Runping Qi (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-2086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12537653 ] 

Runping Qi commented on HADOOP-2086:
------------------------------------

+0 the code looks good.

However, the semantics of the new api addDependingJob(Job dependingJob) should be clarified further 
for the case where the current Job object is in ready state or has already started execution. In that case, 
this api should be effectively an no op and returns false.




> ability to add dependencies to a job after construction
> -------------------------------------------------------
>
>                 Key: HADOOP-2086
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2086
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.14.2
>         Environment: n/a
>            Reporter: Adrian Woodhead
>             Fix For: 0.16.0
>
>         Attachments: job-add-dependencies.patch
>
>
> The current Job API only allows for dependent jobs to be passed in at object construction time. It would be nice if there was an additional constructor which did not take any depending jobs and then an "addDependingJob" method which could be used to add depending jobs to a job at a later point.

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