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https://issues.apache.org/jira/browse/HADOOP-7050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14697184#comment-14697184
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Todd Grayson commented on HADOOP-7050:
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Sorry fellers,
POSIX ("Portable Operating System Interface for Unix") standard (IEEE Standard
1003.1 2008) states:
http://pubs.opengroup.org/onlinepubs/9699919799/
(from section 3, definitions)
3.431 User Name
A string that is used to identify a user; see also User Database. To be
portable across systems conforming to POSIX.1-2008, the value is composed of
characters from the portable filename character set. The <hyphen> character
should not be used as the first character of a portable user name.
3.278 Portable Filename Character Set
The set of characters from which portable filenames are constructed.
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> proxyuser host/group config properties don't work if user name as DOT in it
> ---------------------------------------------------------------------------
>
> Key: HADOOP-7050
> URL: https://issues.apache.org/jira/browse/HADOOP-7050
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Reporter: Alejandro Abdelnur
>
> If the user contains a DOT, "foo.bar", proxy user configuration fails to be
> read properly and it does not kick in.
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