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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5403) Get rid of yarn.application.classpath
Date Mon, 22 Jul 2013 22:10:48 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13715757#comment-13715757
] 

Sandy Ryza commented on MAPREDUCE-5403:
---------------------------------------

I don't think yarn.resourcemanager.address should be an environment variable.  I think there
is a conceptual difference between a client knowing how to contact a service and a client
knowing about details of the service's internals.  Do you disagree?

In an ideal world, I think should be able to point my application at a YARN cluster without
thinking about where the YARN jars were installed.  I understand that for MR we will still
not entirely have achieved this ideal, because the client still needs to know where the MR
jars are. But the change would be a step in the right direction and help lay the groundwork
for a solution by untangling the application from the framework.
                
> Get rid of yarn.application.classpath
> -------------------------------------
>
>                 Key: MAPREDUCE-5403
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5403
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: client
>    Affects Versions: 2.0.5-alpha
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>
> yarn.application.classpath is a confusing property because it is used by MapReduce and
not YARN, and MapReduce already has mapreduce.application.classpath, which provides the same
functionality.

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