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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-729) Create a MapReduceMaster interface for the JobTracker
Date Thu, 09 Jul 2009 16:14:14 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12729308#action_12729308

Arun C Murthy commented on MAPREDUCE-729:

bq. Indeed to allow better refactoring, we could even consider more finer grained interfaces
which are all extended by MapReduceMaster, which JobTracker implements. I suppose that will
make it even more useful to write true unit tests in hadoop. Thoughts ?

Hemanth, do you have any specific use-cases/suggestions?

> Create a MapReduceMaster interface for the JobTracker
> -----------------------------------------------------
>                 Key: MAPREDUCE-729
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-729
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: jobtracker
>            Reporter: Arun C Murthy
>            Assignee: Arun C Murthy
>             Fix For: 0.21.0
> It would be useful to have a 'master' interface which specifies all the interfaces exposed
by the JobTracker to allow for mock-objects, simulation (MAPREDUCE-728) etc.

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