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