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https://issues.apache.org/jira/browse/SPARK-17421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen updated SPARK-17421:
------------------------------
    Assignee: Frederick Reiss

> Document 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: Improvement
>          Components: Build
>            Reporter: Frederick Reiss
>            Assignee: Frederick Reiss
>            Priority: Trivial
>             Fix For: 2.0.1, 2.1.0
>
>
> 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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