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https://issues.apache.org/jira/browse/HIVE-842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12913466#action_12913466
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Venkatesh S commented on HIVE-842:
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>     *  Do Hive tasks ever need to authenticate to the metastore? If so, we 
> will have to build a delegation token system into Hive.
I learnt it from Alan and Pradeep that Howl uses the commit task to talk to the 
metastore. Hence we'll have to build the delegation token system.

> Authentication Infrastructure for Hive
> --------------------------------------
>
>                 Key: HIVE-842
>                 URL: https://issues.apache.org/jira/browse/HIVE-842
>             Project: Hadoop Hive
>          Issue Type: New Feature
>          Components: Server Infrastructure
>            Reporter: Edward Capriolo
>            Assignee: Todd Lipcon
>         Attachments: HiveSecurityThoughts.pdf
>
>
> This issue deals with the authentication (user name,password) infrastructure. 
> Not the authorization components that specify what a user should be able to 
> do.

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