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https://issues.apache.org/jira/browse/SPARK-1437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen closed SPARK-1437.
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Resolution: Won't Fix
> Jenkins should build with Java 6
> --------------------------------
>
> Key: SPARK-1437
> URL: https://issues.apache.org/jira/browse/SPARK-1437
> Project: Spark
> Issue Type: Bug
> Components: Build
> Affects Versions: 0.9.0
> Reporter: Sean Owen
> Assignee: Patrick Wendell
> Priority: Minor
> Labels: javac, jenkins
> Attachments: Screen Shot 2014-04-07 at 22.53.56.png
>
>
> Apologies if this was already on someone's to-do list, but I wanted to track
> this, as it bit two commits in the last few weeks.
> Spark is intended to work with Java 6, and so compiles with source/target
> 1.6. Java 7 can correctly enforce Java 6 language rules and emit Java 6
> bytecode. However, unless otherwise configured with -bootclasspath, javac
> will use its own (Java 7) library classes. This means code that uses classes
> in Java 7 will be allowed to compile, but the result will fail when run on
> Java 6.
> This is why you get warnings like ...
> Using /usr/java/jdk1.7.0_51 as default JAVA_HOME.
> ...
> [warn] warning: [options] bootstrap class path not set in conjunction with
> -source 1.6
> The solution is just to tell Jenkins to use Java 6. This may be stating the
> obvious, but it should just be a setting under "Configure" for
> SparkPullRequestBuilder. In our Jenkinses, JDK 6/7/8 are set up; if it's not
> an option already I'm guessing it's not too hard to get Java 6 configured on
> the Amplab machines.
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