[jira] [Updated] (YARN-5177) Make Node-Manager Download-Resource Component extensible.

["Emeka (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-5177?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Emeka updated YARN-5177:
------------------------
    Attachment: YARN-5177-V0.patch

> Make Node-Manager Download-Resource Component extensible.
> ---------------------------------------------------------
>
>                 Key: YARN-5177
>                 URL: https://issues.apache.org/jira/browse/YARN-5177
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>    Affects Versions: 2.7.0
>            Reporter: Emeka
>            Priority: Minor
>         Attachments: YARN-5177-V0.patch
>
>
> Problem:
> - Downloading files to a local machine/node is called "resource-localization".
> - There are two components that perform resource-location (PublicLocalizer and ComponetLocalizers)
> - Both components utilizes FSDownload.class to perform their downloads.
> - We need a custom implementation of FSDownload.
> Solution:
> - With this change, we make FSDownload.class extensible by wrapping it in a new ResourceDownloader.interface
> - We also update the PublicLocalizer and ComponetLocalizers to load ResourceDownloader rather than FSDownload.
> - NOTE: We use reflection to load the right implementation during runtime.



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