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https://issues.apache.org/jira/browse/SPARK-17421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15468943#comment-15468943
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Apache Spark commented on SPARK-17421:
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User 'frreiss' has created a pull request for this issue:
https://github.com/apache/spark/pull/14986

> Warnings about "MaxPermSize" parameter when building with Maven and Java 8
> --------------------------------------------------------------------------
>
>                 Key: SPARK-17421
>                 URL: https://issues.apache.org/jira/browse/SPARK-17421
>             Project: Spark
>          Issue Type: Bug
>          Components: Build
>            Reporter: Frederick Reiss
>            Priority: Minor
>
> When building Spark with {{build/mvn}} or {{dev/run-tests}}, a Java warning 
> appears repeatedly on STDERR:
> {{OpenJDK 64-Bit Server VM warning: ignoring option MaxPermSize=512M; support 
> was removed in 8.0}}
> This warning is due to {{build/mvn}} adding the {{-XX:MaxPermSize=512M}} 
> option to {{MAVEN_OPTS}}. When compiling with Java 7, this parameter is 
> essential. With Java 8, the parameter leads to the warning above.
> Because {{build/mvn}} adds {{MaxPermSize}} to {{MAVEN_OPTS}}, even if that 
> environment variable doesn't contain the option, setting {{MAVEN_OPTS}} to a 
> string that does not contain {{MaxPermSize}} has no effect.



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