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https://issues.apache.org/jira/browse/HADOOP-16559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16935388#comment-16935388
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Vinayakumar B commented on HADOOP-16559:
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{quote}And here, since this is not a trivial change, I suggest we revert 
HADOOP-16557 first? Now it is a pain for developpers as we need protobuf 3.7.1 
to compile trunk and then 2.5.0 to compile other branches...
{quote}
Need not switch back and forth to build separate branches. protobuf 3.7.1 can 
be installed in a separate location (ex: /opt/protobuf-3.7.1) and "protoc.path" 
system property pointing to absolute path of 3.7.1 protoc (ex: 
-Dprotoc.path=/opt/protobuf-3.7.1/bin/protoc)  can be used to build trunk until 
we replace protobuf-maven-plugin.

> [HDFS] use protobuf-maven-plugin to generate protobuf classes
> -------------------------------------------------------------
>
>                 Key: HADOOP-16559
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16559
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Vinayakumar B
>            Priority: Major
>
> Use "protoc-maven-plugin" to dynamically download protobuf executable to 
> generate protobuf classes from proto file



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