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https://issues.apache.org/jira/browse/HADOOP-3098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15313070#comment-15313070
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Vipul Agarwal commented on HADOOP-3098:
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We have a similar problem when using winbind '/' separator. Can someone look
into this please?
> dfs -chown does not like "_" underscore in user name
> ----------------------------------------------------
>
> Key: HADOOP-3098
> URL: https://issues.apache.org/jira/browse/HADOOP-3098
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.16.0, 0.16.1
> Reporter: Koji Noguchi
> Assignee: Raghu Angadi
> Priority: Blocker
> Fix For: 0.16.2
>
> Attachments: HADOOP-3098.patch, HADOOP-3098.patch
>
>
> :~$ hadoop dfs -chown aaa_bbb /user/knoguchi/test.txt
> chown: 'aaa_bbb' does not match expected pattern for [owner][:group].
> in 0.16.1, only alphabets and numbers are allowed. Shouldn't '_' be allowed?
> I couldn't find any standard, but in Solaris10, it's defined as
> http://docs.sun.com/app/docs/doc/816-5174/6mbb98uhg?a=view
> bq. The login (login) and role (role) fields accept a string of no more than
> eight bytes consisting of characters from the set of alphabetic characters,
> numeric characters, period (.), underscore (_), and hyphen (-). The first
> character should be alphabetic and the field should contain at least one
> lower case alphabetic character. A warning message is displayed if these
> restrictions are not met.
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