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https://issues.apache.org/jira/browse/HADOOP-6323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12787611#action_12787611
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Doug Cutting commented on HADOOP-6323:
--------------------------------------

I'd prefer we throw an exception rather than return null when a comparator is 
not available.  This will permit code that requires comparable objects to use 
this API without having to worry about NullPointerExceptions or performing 
extra checks.

> Serialization should provide comparators
> ----------------------------------------
>
>                 Key: HADOOP-6323
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6323
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: io
>            Reporter: Doug Cutting
>            Assignee: Aaron Kimball
>         Attachments: HADOOP-6323.2.patch, HADOOP-6323.patch
>
>
> The Serialization interface should permit one to create raw comparators.

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