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https://issues.apache.org/jira/browse/MAPREDUCE-2901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13096091#comment-13096091
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praveen sripati commented on MAPREDUCE-2901:
--------------------------------------------

Ubuntu 11.04 comes with ProtoBuf 2.3.0, which gave me the below error while 
compiling yarn.

yarn_protos.proto:4:8: Option "java_generate_equals_and_hash" unknown.

/usr/bin/protoc --version
libprotoc 2.3.0

/home/praveensripati/Installations/protobuf-2.4.1/src/protoc --version
libprotoc 2.4.1

> Build should fail sanely if protoc isn't on PATH
> ------------------------------------------------
>
>                 Key: MAPREDUCE-2901
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2901
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: build
>    Affects Versions: 0.23.0
>            Reporter: Vinod Kumar Vavilapalli
>
> It now fails "[ERROR] Failed to execute goal 
> org.codehaus.mojo:exec-maven-plugin:1.2:exec (generate-sources) on project 
> hadoop-yarn-api: Command execution failed. Process exited with an error: 
> 1(Exit value: 1) -> [Help 1]".
> Which doesn't help much.

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