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https://issues.apache.org/jira/browse/HADOOP-13707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15582199#comment-15582199
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Brahma Reddy Battula commented on HADOOP-13707:
-----------------------------------------------

[~eyang] As I mentioned above {{MetricsServlet.java}} changes are missed in 
branch-2 
[Commit|https://github.com/apache/hadoop/commit/439422fff923ae6aea1f7547fe24d0e23fbd8f7f#commitcomment-19446926]
 ,Please have a look at latest patch uploaded by [~yuanbo] for branch-2 and 
branch-2.8..

May be you need revert from branch-2 and apply the latest patch for branch-2 OR 
prepare addedum patch for only {{MetricsServlet.java}} changes.



> 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: 2.9.0, 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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