[jira] [Updated] (MAPREDUCE-3850) Avoid redundant calls for tokens in TokenCache

["Daryn Sharp (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3850?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daryn Sharp updated MAPREDUCE-3850:
-----------------------------------

    Attachment: MAPREDUCE-3850-1.patch

Fixed patch.  A test was failing to merge.
                
> Avoid redundant calls for tokens in TokenCache
> ----------------------------------------------
>
>                 Key: MAPREDUCE-3850
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3850
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 0.23.1, 0.24.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: MAPREDUCE-3850-1.patch, MAPREDUCE-3850.patch, MAPREDUCE-3850.patch
>
>
> The {{TokenCache}} will repeatedly call the same filesystem for tokens.  This is inefficient and can easily be changed to only call each filesystem once.

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