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From "Greg Senia (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-3452) Bogus token usernames cause many invalid group lookups
Date Fri, 06 Nov 2015 19:47:11 GMT

     [ https://issues.apache.org/jira/browse/YARN-3452?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Greg Senia updated YARN-3452:
    Attachment: tactical_defense.patch

> Bogus token usernames cause many invalid group lookups
> ------------------------------------------------------
>                 Key: YARN-3452
>                 URL: https://issues.apache.org/jira/browse/YARN-3452
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: security
>            Reporter: Jason Lowe
>         Attachments: tactical_defense.patch
> YARN uses a number of bogus usernames for tokens, like application attempt IDs for NM
tokens or even the hardcoded "testing" for the container localizer token.  These tokens cause
the RPC layer to do group lookups on these bogus usernames which will never succeed but can
take a long time to perform.

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