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Date: Fri, 26 Oct 2007 09:53:52 -0700 (PDT)
From: "Runping Qi (JIRA)" <jira@apache.org>
To: hadoop-dev@lucene.apache.org
Subject: [jira] Commented: (HADOOP-2086) ability to add dependencies to a
 job after construction
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    [ https://issues.apache.org/jira/browse/HADOOP-2086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12538017 ] 

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


Right. WAITING is the only valid state we can add a dependending job. 
submit() and setState() alter the state variable.
Thus they should be synchronized. And they should be package private too (only JobControl uses them).


> 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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