[ https://issues.apache.org/jira/browse/HADOOP-8465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13294025#comment-13294025 ] 

Aaron T. Myers commented on HADOOP-8465:
----------------------------------------

+1, the patch looks good to me.
                
> hadoop-auth should support ephemeral authentication
> ---------------------------------------------------
>
>                 Key: HADOOP-8465
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8465
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: security
>    Affects Versions: 2.0.1-alpha
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>             Fix For: 2.0.1-alpha
>
>         Attachments: HADOOP-8465.patch, HADOOP-8465.patch
>
>
> Currently, once a client is authenticated the generated authentication-token (& cookie) are valid for a given (service configurable) lifespan.
> Once the authentication-token (& cookie) is issued, the authentication logic will not be triggered until the authentication-token expires.
> This behavior does not work well with delegation tokens expected behavior where delegation tokens can be canceled at any time.
> Having ephemeral authentication (which is check on every request) would address this issue.

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