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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-6084) Load MR Configuration from distributed cache rather than individual node
Date Thu, 11 Sep 2014 03:28:34 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6084?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Junping Du updated MAPREDUCE-6084:
----------------------------------
    Attachment: Compatibility of Configuration Across Different MR Versions.pdf

> Load MR Configuration from distributed cache rather than individual node
> ------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6084
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6084
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 2.5.0
>            Reporter: Junping Du
>            Assignee: Junping Du
>         Attachments: Compatibility of Configuration Across Different MR Versions.pdf
>
>
> For rolling upgrade YARN & MapReduce component, we already support to submit jobs
against different versions of mapreduce jars based on distributed cache (please refer MAPREDUCE-4421).
However, this could bring up some potential issues if old jar cannot find a new added class
with new configurations that upgrade together with Hadoop components. For details, please
refer the proposal in attachments. 



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