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https://issues.apache.org/jira/browse/HADOOP-6420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12789092#action_12789092
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Arun C Murthy commented on HADOOP-6420:
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Aaron, can you please explain the use case a little more? Why do we really need 
maps? Why isn't the requisite metadata serializable? 

> String-to-String Maps should be embeddable in Configuration
> -----------------------------------------------------------
>
>                 Key: HADOOP-6420
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6420
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: conf
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>         Attachments: HADOOP-6420.2.patch, HADOOP-6420.3.patch, 
> HADOOP-6420.4.patch, HADOOP-6420.patch
>
>
> Per MAPREDUCE-1126, we need to be able to take a map of (key, value) pairs 
> and embed that inside a Configuration object.

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