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https://issues.apache.org/jira/browse/HADOOP-15302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17080834#comment-17080834
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Hadoop QA commented on HADOOP-15302:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m  
0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red}  0m  7s{color} 
| {color:red} HADOOP-15302 does not apply to trunk. Rebase required? Wrong 
Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | HADOOP-15302 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12913885/HADOOP-15302.002.patch
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| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/16867/console |
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> 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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