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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4053) Schedulers need to know when a job has completed
Date Tue, 07 Oct 2008 22:16:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12637683#action_12637683
] 

Owen O'Malley commented on HADOOP-4053:
---------------------------------------

I'm not  comfortable with making the classes public in the mapred package. Could we make them
public in another package? Or is the visibility wrong? I just don't want the public javadoc
to include these events that absolutely don't matter to users of map/reduce. If we move them
to another package, we should turn off the public javadoc from that package.

> Schedulers need to know when a job has completed
> ------------------------------------------------
>
>                 Key: HADOOP-4053
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4053
>             Project: Hadoop Core
>          Issue Type: Improvement
>    Affects Versions: 0.19.0
>            Reporter: Vivek Ratan
>            Assignee: Amar Kamat
>            Priority: Blocker
>         Attachments: HADOOP-4053-v1.patch, HADOOP-4053-v2.patch, HADOOP-4053-v3.1.patch,
HADOOP-4053-v3.2.patch, HADOOP-4053-v4.patch
>
>
> The JobInProgressListener interface is used by the framework to notify Schedulers of
when jobs are added, removed, or updated. Right now, there is no way for the Scheduler to
know that a job has completed. jobRemoved() is called when a job is retired, which can happen
many hours after a job is actually completed. jobUpdated() is called when a job's priority
is changed. We need to notify a listener when a job has completed (either successfully, or
has failed or been killed). 

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