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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1321) NMTokenCache is a a singleton, prevents multiple AMs running in a single JVM to work correctly
Date Mon, 21 Oct 2013 04:13:43 GMT

    [ https://issues.apache.org/jira/browse/YARN-1321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13800343#comment-13800343
] 

Alejandro Abdelnur commented on YARN-1321:
------------------------------------------

As test-patch may not run tests in mapred and distributed shell because there are no changes
there  (with the latest patch), I've run the tests on those module and they all passed.

> NMTokenCache is a a singleton, prevents multiple AMs running in a single JVM to work
correctly
> ----------------------------------------------------------------------------------------------
>
>                 Key: YARN-1321
>                 URL: https://issues.apache.org/jira/browse/YARN-1321
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 2.2.0
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>            Priority: Blocker
>             Fix For: 2.2.1
>
>         Attachments: YARN-1321.patch, YARN-1321.patch
>
>
> NMTokenCache is a singleton. Because of this, if running multiple AMs in a single JVM
NMTokens for the same node from different AMs step on each other and starting containers fail
due to mismatch tokens.
> The error observed in the client side is something like:
> {code}
> ERROR org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException as:llama
(auth:PROXY) via llama (auth:SIMPLE) cause:org.apache.hadoop.yarn.exceptions.YarnException:
Unauthorized request to start container. 
> NMToken for application attempt : appattempt_1382038445650_0002_000001 was used for starting
container with container token issued for application attempt : appattempt_1382038445650_0001_000001
> {code}



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