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From "Remus Rusanu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10644) Remote principal name case sensitivity issue introduced on Windows by HADOOP-10418
Date Fri, 30 May 2014 13:41:01 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14013625#comment-14013625
] 

Remus Rusanu commented on HADOOP-10644:
---------------------------------------

Note that as per RFC4120 the fix is to make the confPrincipal lowercase:

{code}
6.2.1.  Name of Server Principals

                                                           ... Where the name of the host

   is not case sensitive (for example, with Internet domain names) the
   name of the host MUST be lowercase....
{code} 

> Remote principal name case sensitivity issue introduced on Windows by HADOOP-10418
> ----------------------------------------------------------------------------------
>
>                 Key: HADOOP-10644
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10644
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.4.0
>            Reporter: Remus Rusanu
>              Labels: windows
>
> HADOOP-10418 caused the SPN to be generated using KRB_NT_SRV_HST type. This results in
a wrong case FQDN name and the 
> {code}
> isPrincipalValid = serverPrincipal.equals(confPrincipal);
> {code}
> check fails due to case difference.



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