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https://issues.apache.org/jira/browse/HADOOP-14146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16061075#comment-16061075
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Kihwal Lee commented on HADOOP-14146:
-------------------------------------
+1 for the addendum. Will commit it shortly.
> KerberosAuthenticationHandler should authenticate with SPN in AP-REQ
> --------------------------------------------------------------------
>
> Key: HADOOP-14146
> URL: https://issues.apache.org/jira/browse/HADOOP-14146
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Affects Versions: 2.5.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Fix For: 2.9.0, 3.0.0-alpha4, 2.8.2
>
> Attachments: HADOOP-14146.1.patch, HADOOP-14146.2.patch,
> HADOOP-14146.3.patch, HADOOP-14146.addendum.patch, HADOOP-14146.patch
>
>
> Many attempts (HADOOP-10158, HADOOP-11628, HADOOP-13565) have tried to add
> multiple SPN host and/or realm support to spnego authentication. The basic
> problem is the server tries to guess and/or brute force what SPN the client
> used. The server should just decode the SPN from the AP-REQ.
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