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https://issues.apache.org/jira/browse/HADOOP-10301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13893462#comment-13893462
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Daryn Sharp commented on HADOOP-10301:
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Under what condition(s) do you think the 401 sans header can occur? The unit
tests should cover the various scenarios, but I'm double checking all the code
paths again.
> AuthenticationFilter should return Forbidden for failed authentication
> ----------------------------------------------------------------------
>
> Key: HADOOP-10301
> URL: https://issues.apache.org/jira/browse/HADOOP-10301
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Blocker
> Attachments: HADOOP-10301.branch-23.patch,
> HADOOP-10301.branch-23.patch, HADOOP-10301.patch, HADOOP-10301.patch
>
>
> The hadoop-auth AuthenticationFilter returns a 401 Unauthorized without a
> WWW-Authenticate headers. The is illegal per the HTTP RPC and causes a NPE
> in the HttpUrlConnection.
> This is half of a fix that affects webhdfs. See HDFS-4564.
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