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https://issues.apache.org/jira/browse/HADOOP-9117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13510660#comment-13510660
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Colin Patrick McCabe commented on HADOOP-9117:
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This looks good.  It's in Java, so all Hadoop programmers should be able to 
understand it.  It also will benefit the wider community of Maven users, not 
just our project.

I took a quick look at the linked repo.  Overall, the code is very good.  In 
{{VersionInfoMojo.java:determineSCM}}, it seems like there's a bit of 
unnecessary if nesting.  Perhaps it would be better to just return the SCM that 
you have determined immediately, and add the log message in the caller?
                
> replace protoc ant plugin exec with a maven plugin
> --------------------------------------------------
>
>                 Key: HADOOP-9117
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9117
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: build
>    Affects Versions: 2.0.2-alpha
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>         Attachments: HADOOP-9117.patch
>
>
> The protoc compiler is currently invoked using ant plugin exec. There is a 
> bug in the ant plugin exec task which does not consume the STDOUT or STDERR 
> appropriately making the build to stop sometimes (you need to press enter to 
> continue).

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