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https://issues.apache.org/jira/browse/HADOOP-3407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12597599#action_12597599
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Owen O'Malley commented on HADOOP-3407:
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I was being good and not putting the solution into the bug description!
You would change the implementation to TreeMap<String,String>.
The use case would be supporting:
mapred.task.env.*
to set environment variables in the tasks, where the key is the name of the
environment variable.
> Provide a query method to find all of the attributes under a given root
> -----------------------------------------------------------------------
>
> Key: HADOOP-3407
> URL: https://issues.apache.org/jira/browse/HADOOP-3407
> Project: Hadoop Core
> Issue Type: Improvement
> Components: conf
> Reporter: Owen O'Malley
> Assignee: Arun C Murthy
>
> It would be really nice to have a way to query all of the attributes under a
> given root:
> {code}
> String[] attrs = conf.getChildAttributes("mapred.task");
> {code}
> which would return all of the attributes in the configurat that start with
> "mapred.task...."
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