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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (MAPREDUCE-5663) Add an interface to Input/Ouput Formats to obtain delegation tokens
Date Mon, 13 Jan 2014 21:00:56 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13869968#comment-13869968
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Alejandro Abdelnur edited comment on MAPREDUCE-5663 at 1/13/14 8:59 PM:
------------------------------------------------------------------------

[~sseth], [~acmurthy], why is this needed? if the AM has the corresponding delegation tokens,
things work just fine, Oozie has been doing this for years; the splits are computed in the
launcher job which does not have kerberos credentials.


was (Author: tucu00):
[~sseth], [~acmurthy], why this is needed, if the AM has the corresponding delegation tokens,
things work just fine, Oozie has been doing this for years; the splits are computed in the
launcher job which does not have kerberos credentials.

> 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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