[jira] [Commented] (HADOOP-15302) Enable DataNode/NameNode service plugins with Service Provider interface

["Shilun Fan (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-15302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17803105#comment-17803105 ] 

Shilun Fan commented on HADOOP-15302:
-------------------------------------

Bulk update: moved all 3.4.0 non-blocker issues, please move back if it is a blocker. Retarget 3.5.0.

> Enable DataNode/NameNode service plugins with Service Provider interface
> ------------------------------------------------------------------------
>
>                 Key: HADOOP-15302
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15302
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Marton Elek
>            Assignee: Marton Elek
>            Priority: Major
>         Attachments: HADOOP-15302.001.patch, HADOOP-15302.002.patch
>
>
> HADOOP-5257 introduced ServicePlugin capabilities for NameNode/DataNode. As of now they could be activated by configuration values. 
> I propose to activate plugins with Service Provider Interface. In case of a special service file is added a jar it would be enough to add the plugin to the classpath. It would help to add optional components to NameNode/DataNode with settings the classpath.
> This is the same api which could be used in java 9 to consume defined services.



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