[jira] Commented: (MAPREDUCE-223) JobClient should work with -1/+1 version of JobTracker

["Krishna Ramachandran (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897407#action_12897407 ] 

Krishna Ramachandran commented on MAPREDUCE-223:
------------------------------------------------

it has been sitting for over 2 years and I do not believe anything has changed. hdfs I believe provide read only interface for listing/retrieving data over http. 

Is this still critical  - to  have similar interface  to embedded JT http server on top of what the web interface already provides (for accessing task or job logs?)


> JobClient should work with -1/+1 version of JobTracker
> ------------------------------------------------------
>
>                 Key: MAPREDUCE-223
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-223
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>         Environment: all
>            Reporter: Alejandro Abdelnur
>            Priority: Critical
>
> Currently there is version check on the RPC calls that enforces the same Hadoop version on the client and the server.
> To enable phased upgrades of systems using Hadoop and Hadoop itself the {{JobClient}} should be able to interact with a {{JobTracker}} of the previous and the next version of Hadoop (or with a range).

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