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https://issues.apache.org/jira/browse/HADOOP-10520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13974260#comment-13974260
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Uma Maheswara Rao G commented on HADOOP-10520:
----------------------------------------------

Thanks for the patch Liu. 

HarFileSystem test has assert on FileSystem api 
{noformat}
2014-04-18 16:34:50,923 ERROR fs.TestHarFileSystem 
(TestHarFileSystem.java:testInheritedMethodsImplemented(318)) - HarFileSystem 
MUST implement public void 
org.apache.hadoop.fs.FileSystem.setXAttrs(org.apache.hadoop.fs.Path,java.util.List)
 throws java.io.IOException
2014-04-18 16:34:50,925 ERROR fs.TestHarFileSystem 
(TestHarFileSystem.java:testInheritedMethodsImplemented(318)) - HarFileSystem 
MUST implement public java.util.List 
org.apache.hadoop.fs.FileSystem.getXAttrs(org.apache.hadoop.fs.Path) throws 
java.io.IOException
2014-04-18 16:34:50,926 ERROR fs.TestHarFileSystem 
(TestHarFileSystem.java:testInheritedMethodsImplemented(318)) - HarFileSystem 
MUST implement public java.util.List 
{noformat}

I think we have to add the API details in MustNotImplement.

> Extended attributes definition and FileSystem APIs for extended attributes.
> ---------------------------------------------------------------------------
>
>                 Key: HADOOP-10520
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10520
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs
>            Reporter: Yi Liu
>            Assignee: Yi Liu
>             Fix For: 3.0.0
>
>         Attachments: HADOOP-10520.patch
>
>
> This JIRA defines XAttr (Extended Attribute), it consists of a name and 
> associated data, and 4 namespaces are defined: user, trusted, security and 
> system. FileSystem APIs for XAttr include setXAttrs, getXAttrs, removeXAttrs 
> and so on. For more information, please refer to HDFS-2006.



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