[HADOOP-3098] dfs -chown does not like "_" underscore in user name

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.16.0, 0.16.1
• Fix Version/s: 0.16.2
• Component/s: fs
• Release Note: chown and chgrp commands allow more flexible names compared to 0.16. See 'fs -help chown'. Inform Users : YES.
• Assignee: Raghu Angadi
• Reporter: Koji Noguchi
• Created: 26/Mar/08 19:09
• Updated: 02/Jun/16 21:12
• Resolved: 28/Mar/08 17:23

Description

:~$ 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

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.

Issue Links

• relates to: HADOOP-9851 dfs -chown does not like "+" plus sign in user name