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