[jira] [Updated] (MAPREDUCE-3825) MR should not be getting duplicate tokens for a MR Job.

["Robert Joseph Evans (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3825?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Joseph Evans updated MAPREDUCE-3825:
-------------------------------------------

    Target Version/s: 0.23.3, 2.0.0, 3.0.0  (was: 0.24.0, 0.23.1)
    
> MR should not be getting duplicate tokens for a MR Job.
> -------------------------------------------------------
>
>                 Key: MAPREDUCE-3825
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3825
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 0.23.1, 0.24.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: MAPREDUCE-3825.patch, TokenCache.pdf, solution4.patch
>
>
> This is the counterpart to HADOOP-7967.  
> MR gets tokens for all input, output and the default filesystem when a MR job is submitted. 
> The APIs in FileSystem make it challenging to avoid duplicate tokens when there are file systems that have embedded
> filesystems.
> Here is the original description that Daryn wrote: 
> The token cache currently tries to assume a filesystem's token service key.  The assumption generally worked while there was a one to one mapping of filesystem to token.  With the advent of multi-token filesystems like viewfs, the token cache will try to use a service key (ie. for viewfs) that will never exist (because it really gets the mounted fs tokens).
> The descriop

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