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https://issues.apache.org/jira/browse/MAPREDUCE-1938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amareshwari Sriramadasu updated MAPREDUCE-1938:
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Status: Open (was: Patch Available)
bq. As for moving to MRJobConfig, based on discussions, my understanding is,
desired to have this flag semi-private (MRJobConfig i believe is very public).
MRJobConfig is the place to hold all job-level config paramaters. And it is not
public. Annotation says "private, evolving". So, the configuration should be in
MRJobConfig. Also, the name should say mapreduce.job.user.classpath.first
saying it is a job level property.
Also, in your next patch, can you do the changes in test-case suggested by Luke?
Are you planning to raise a Hadoop-common jira for the changes in bin/hadoop
script?
> Ability for having user's classes take precedence over the system classes for
> tasks' classpath
> ----------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-1938
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1938
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: job submission, task, tasktracker
> Reporter: Devaraj Das
> Fix For: 0.22.0
>
> Attachments: mapred-1938-1, mapred-1938-2.patch,
> mr-1938-bp20.1.patch, mr-1938-bp20.patch
>
>
> It would be nice to have the ability in MapReduce to allow users to specify
> for their jobs alternate implementations of classes that are already defined
> in the MapReduce libraries. For example, an alternate implementation for
> CombineFileInputFormat.
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