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From "Siddharth Seth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5663) Add an interface to Input/Ouput Formats to obtain delegation tokens
Date Fri, 17 Jan 2014 22:38:23 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13875343#comment-13875343
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Siddharth Seth commented on MAPREDUCE-5663:
-------------------------------------------

bq.  I think an URI[] (all of the same scheme being passed to a the corresponding CredentialsProvider
impl should be enough, no?
As long as it's possible to represent services as URIs, which seems possible - it'll likely
just be for the purpose of fetching credentials for hbase, hcat etc.

> Add an interface to Input/Ouput Formats to obtain delegation tokens
> -------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5663
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5663
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Siddharth Seth
>            Assignee: Michael Weng
>         Attachments: MAPREDUCE-5663.4.txt, MAPREDUCE-5663.5.txt, MAPREDUCE-5663.6.txt,
MAPREDUCE-5663.patch.txt, MAPREDUCE-5663.patch.txt2, MAPREDUCE-5663.patch.txt3
>
>
> Currently, delegation tokens are obtained as part of the getSplits / checkOutputSpecs
calls to the InputFormat / OutputFormat respectively.
> This works as long as the splits are generated on a node with kerberos credentials. For
split generation elsewhere (AM for example), an explicit interface is required.



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