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https://issues.apache.org/jira/browse/SPARK-15451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15294370#comment-15294370
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Sean Owen commented on SPARK-15451:
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That's fine with me, but so is just going ahead and requiring Java 8. That may
be upon us if there's no objection to requiring it in 2.1.0, which means master
would soon require it. Just saying don't go to a lot of trouble.
> Spark PR builder should fail if code doesn't compile against JDK 7
> ------------------------------------------------------------------
>
> Key: SPARK-15451
> URL: https://issues.apache.org/jira/browse/SPARK-15451
> Project: Spark
> Issue Type: Bug
> Components: Build
> Affects Versions: 2.0.0
> Reporter: Marcelo Vanzin
>
> We need to compile certain parts of the build using jdk8, so that we test
> things like lambdas. But when possible, we should either compile using jdk7,
> or provide jdk7's rt.jar to javac. Otherwise it's way too easy to slip in
> jdk8-specific library calls.
> I'll take a look at fixing the maven / sbt files, but I'm not sure how to
> update the PR builders since this will most probably require at least a new
> env variable (to say where jdk7 is).
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