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From "Xiao Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13251) Authenticate with Kerberos credentials when renewing KMS delegation token
Date Tue, 28 Jun 2016 03:11:57 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15352265#comment-15352265
] 

Xiao Chen commented on HADOOP-13251:
------------------------------------

Thank you so much Andrew! I really appreciate your patient reviews and advice.

> Authenticate with Kerberos credentials when renewing KMS delegation token
> -------------------------------------------------------------------------
>
>                 Key: HADOOP-13251
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13251
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: kms
>    Affects Versions: 2.8.0
>            Reporter: Xiao Chen
>            Assignee: Xiao Chen
>             Fix For: 2.8.0
>
>         Attachments: HADOOP-13251.01.patch, HADOOP-13251.02.patch, HADOOP-13251.03.patch,
HADOOP-13251.04.patch, HADOOP-13251.05.patch, HADOOP-13251.06.patch, HADOOP-13251.07.patch,
HADOOP-13251.08.patch, HADOOP-13251.08.patch, HADOOP-13251.09.patch, HADOOP-13251.10.patch,
HADOOP-13251.innocent.patch
>
>
> Turns out KMS delegation token renewal feature (HADOOP-13155) does not work well with
client side impersonation.
> In a MR example, an end user (UGI:user) gets all kinds of DTs (with renewer=yarn), and
pass them to Yarn. Yarn's resource manager (UGI:yarn) then renews these DTs as long as the
MR jobs are running. But currently, the token is used at the kms server side to decide the
renewer, in which case is always the token's owner. This ends up rejecting the renew request
due to renewer mismatch.



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