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https://issues.apache.org/jira/browse/HADOOP-7101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13571114#comment-13571114
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Claus Ibsen commented on HADOOP-7101:
-------------------------------------
I logged a new ticket HADOOP-9280 as this is critical problem for people trying
to upgrade from 0.2 to 1.x
> UserGroupInformation.getCurrentUser() fails when called from non-Hadoop JAAS
> context
> ------------------------------------------------------------------------------------
>
> Key: HADOOP-7101
> URL: https://issues.apache.org/jira/browse/HADOOP-7101
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Blocker
> Fix For: 0.22.0
>
> Attachments: hadoop-7101.txt
>
>
> If a Hadoop client is run from inside a container like Tomcat, and the
> current AccessControlContext has a Subject associated with it that is not
> created by Hadoop, then UserGroupInformation.getCurrentUser() will throw
> NoSuchElementException, since it assumes that any Subject will have a hadoop
> User principal.
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