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https://issues.apache.org/jira/browse/HDFS-2399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13119908#comment-13119908
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Sanjay Radia commented on HDFS-2399:
------------------------------------

After HDFS-2181, HDFS wire types are segregated in package 
protocolR23Compatible. Hence the native data types of 
HDFS do not need to be Writable. Note we probably need to do a similar 
separation of data types written to persistent storage (fsimage and edit logs).
                
> Remove all  Writable from HDFS data type since the wire protocol types have 
> been segregated in protocolR23Compatible.
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-2399
>                 URL: https://issues.apache.org/jira/browse/HDFS-2399
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Sanjay Radia
>            Assignee: Sanjay Radia
>


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