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From "Xuan Gong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3103) AMRMClientImpl does not update AMRM token properly
Date Wed, 28 Jan 2015 22:57:35 GMT

    [ https://issues.apache.org/jira/browse/YARN-3103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14296008#comment-14296008
] 

Xuan Gong commented on YARN-3103:
---------------------------------

I do not have any other comments. +1 for the patch.

bq. The previous version patch in YARN-3103 actually use the current user, and then changed
to use login user in secure mode for some reason. 
I do not remember why I made this change in YARN-2212. 

> AMRMClientImpl does not update AMRM token properly
> --------------------------------------------------
>
>                 Key: YARN-3103
>                 URL: https://issues.apache.org/jira/browse/YARN-3103
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 2.6.0
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Blocker
>         Attachments: YARN-3103.001.patch
>
>
> AMRMClientImpl.updateAMRMToken updates the token service _before_ storing it to the credentials,
so the token is mapped using the newly updated service rather than the empty service that
was used when the RM created the original AMRM token.  This leads to two AMRM tokens in the
credentials and can still fail if the AMRMTokenSelector picks the wrong one.
> In addition the AMRMClientImpl grabs the login user rather than the current user when
security is enabled, so it's likely the UGI being updated is not the UGI that will be used
when reconnecting to the RM.
> The end result is that AMs can fail with invalid token errors when trying to reconnect
to an RM after a new AMRM secret has been activated.



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