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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3098) dfs -chown does not like "_" underscore in user name
Date Wed, 26 Mar 2008 22:31:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12582456#action_12582456
] 

Owen O'Malley commented on HADOOP-3098:
---------------------------------------

-1 on this for 16.2, since it doesn't seem to be a bug.

I think for 17 we should decide what the valid characters in group and user names are. Given
kerberos, I think it should likely consist of characters from:

[a-zA-Z0-9_@./]

Thoughts?

> dfs -chown does not like "_" underscore in user name
> ----------------------------------------------------
>
>                 Key: HADOOP-3098
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3098
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.16.0, 0.16.1
>            Reporter: Koji Noguchi
>            Priority: Blocker
>             Fix For: 0.16.2
>
>
> :~$ 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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