Steve Loughran commented on HADOOP-13707:

checking this locally.

-Eric's fix for branch-2 has got it happy; Brahma's reversion of the patch from 
2.8 has that happy too. 

I'm going to tweak the tagged release version of this JIRA to 2.9 until a patch 
that builds goes into 2.8. I'm expecting it to work this time, but do a quick 
preflight build before pushing up, if you can. At least with weekend patches 
things can get fixed before our US colleagues get to their keyboards on a 
monday morning.

> 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}
> 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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