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From "Harsh J (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8968) add flag to disable completely version check in the TaskTracker and DataNode
Date Thu, 25 Oct 2012 16:19:12 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13484242#comment-13484242
] 

Harsh J commented on HADOOP-8968:
---------------------------------

I just went through these and the code plus tests look fine to me. +1.

I understand that such a change isn't exactly required on the trunk-end, as we no longer utilize
Hadoop-RPC there.
                
> add flag to disable completely version check in the TaskTracker and DataNode
> ----------------------------------------------------------------------------
>
>                 Key: HADOOP-8968
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8968
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 1.1.0
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>             Fix For: 1.2.0
>
>         Attachments: HADOOP-8968.patch, HADOOP-8968.patch
>
>
> The current logic in the TaskTracker and the DataNode to allow a relax version check
with the JobTracker and NameNode works only if the versions of Hadoop are exactly the same.
> We should add a switch to disable version checking completely, to enable rolling upgrades
between compatible versions (typically patch versions).

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