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https://issues.apache.org/jira/browse/HADOOP-8381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13276840#comment-13276840
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Benoy Antony commented on HADOOP-8381:
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Thanks for the comments Aaron and Daryn.
The first part of the patch is redundant as replacePattern() has logic which
sets fqdn to localhost's fqdn.
I am attaching the new patch which removes this redundant code.
> Substitute _HOST with hostname for HTTP principals
> ----------------------------------------------------
>
> Key: HADOOP-8381
> URL: https://issues.apache.org/jira/browse/HADOOP-8381
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: security
> Affects Versions: 0.22.0
> Reporter: Benoy Antony
> Assignee: Benoy Antony
> Priority: Minor
> Fix For: 0.22.1
>
> Attachments: HOST-substitution-spnego.patch,
> HOST-substitution-spnego.patch
>
>
> SPNEGO based Web Authentication uses HTTP/fqdn@REALM as the kerberos
> principal for each host.
> Since it is difficult to modify the config for each host, a substitution
> feature where _HOST gets replaced by fqdn is implemented.
> The task is to provide similar feature for the kerberos principals used for
> SPNEGO principals
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