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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-8968) add flag to disable completely version check in the TaskTracker and DataNode
Date Wed, 24 Oct 2012 23:36:12 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-8968?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alejandro Abdelnur updated HADOOP-8968:
---------------------------------------

    Description: 
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).

  was:
The logic in the TaskTracker and the DataNode to allow a relax version check with the JobTracker
and NameNode is not working.

The relaxed check is done after the strict check, thus no chance for the relaxed check to
ever happen.

The relaxed check is hardcoded to require exact same versions (allowing different builds).
The relaxed check should be able to work with a prefix of the full version (i.e. to handle
patch releases).

        Summary: add flag to disable completely version check in the TaskTracker and DataNode
 (was: TaskTracker and DataNode relaxed version check is not working)
    
> 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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