[
https://issues.apache.org/jira/browse/MAPREDUCE-1938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973032#action_12973032
]
Owen O'Malley commented on MAPREDUCE-1938:
------------------------------------------
{quote}
If we introduce this feature, we should have a switch at cluster config level
that turns it off so admins can switch it off. And by default it should be off.
{quote}
This feature just makes it easier. It is already possible. The cluster operator
can force the attribute in the configuration making it more difficult again.
> 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
> Assignee: Krishna Ramachandran
> Priority: Blocker
> Fix For: 0.22.0
>
> Attachments: mapred-1938-1, mapred-1938-2.patch, mapred-1938-3.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.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
