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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4053) Schedulers need to know when a job has completed
Date Tue, 07 Oct 2008 16:10:46 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12637531#action_12637531
] 

Hemanth Yamijala commented on HADOOP-4053:
------------------------------------------

Steve, the {{JobInProgressListener}} class which is going to listen to these events is package
private. So, wouldn't that require you to have classes in the hadoop.mapred package anyway
? And AFAIK, we have kept the scheduler related APIs package private where possible as we
are still testing waters. HADOOP-3822 would be when we open this up, I guess.

> 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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