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https://issues.apache.org/jira/browse/HDFS-6299?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13985315#comment-13985315
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Fengdong Yu commented on HDFS-6299:
-----------------------------------

bq.Actually DFSClient is not publicly exposed one and the clear javadoc 
comments there with API. That is like a core helper class delegation from 
client perspective. No harm in having javadoc.

yes, there is no harm, but it's the code style required. please refer to other 
client methods in DFSClent, such as append() ?

> Protobuf for XAttr and client-side implementation 
> --------------------------------------------------
>
>                 Key: HDFS-6299
>                 URL: https://issues.apache.org/jira/browse/HDFS-6299
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client, namenode
>    Affects Versions: HDFS XAttrs (HDFS-2006)
>            Reporter: Uma Maheswara Rao G
>            Assignee: Yi Liu
>             Fix For: HDFS XAttrs (HDFS-2006)
>
>         Attachments: HDFS-6299.patch
>
>
> This JIRA tracks Protobuf for XAttr and implementation for XAttr interfaces 
> in DistributedFilesystem and DFSClient. 
> With this JIRA we may just keep the dummy  implemenation for Xattr API of 
> ClientProtocol in NameNodeRpcServer



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