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https://issues.apache.org/jira/browse/HADOOP-13707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15581091#comment-15581091
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Brahma Reddy Battula commented on HADOOP-13707:
-----------------------------------------------

Yes, again "import javax.servlet.ServletContext" is missed which brokes 
branch-2 compliation and MetricsServlet changes are not present. Actullay 
[~yuanbo] patches are correct but same is not get committed...[~eyang] there 
might be problem while commiting to branch-2 and branch-2.8 from your side.

> If kerberos is enabled while HTTP SPNEGO is not configured, some links cannot 
> be accessed
> -----------------------------------------------------------------------------------------
>
>                 Key: HADOOP-13707
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13707
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Yuanbo Liu
>            Assignee: Yuanbo Liu
>              Labels: security
>             Fix For: 2.8.0, 2.9.0, 3.0.0-alpha2
>
>         Attachments: HADOOP-13707-branch-2-addendum.patch, 
> HADOOP-13707-branch-2.8.patch, HADOOP-13707-branch-2.patch, 
> HADOOP-13707.001.patch, HADOOP-13707.002.patch, HADOOP-13707.003.patch, 
> HADOOP-13707.004.patch
>
>
> In {{HttpServer2#hasAdministratorAccess}}, it uses 
> `hadoop.security.authorization` to detect whether HTTP is authenticated.
> It's not correct, because enabling Kerberos and HTTP SPNEGO are two steps. If 
> Kerberos is enabled while HTTP SPNEGO is not, some links cannot be accessed, 
> such as "/logs", and it will return error message as below:
> {quote}
> HTTP ERROR 403
> Problem accessing /logs/. Reason:
> User dr.who is unauthorized to access this page.
> {quote}
> We should make sure {{HttpServletRequest#getAuthType}} is not null before we 
> invoke {{HttpServer2#hasAdministratorAccess}}.
> {{getAuthType}} means to get the authorization scheme of this request



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