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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-1437) Jenkins should build with Java 6
Date Sun, 03 May 2015 10:35:06 GMT

    [ https://issues.apache.org/jira/browse/SPARK-1437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14525761#comment-14525761
] 

Steve Loughran commented on SPARK-1437:
---------------------------------------

..be good for the pull request test runs to use java6 too; I've already had to purge some
java7-isms that didn't get picked up

> 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, Project Infra
>    Affects Versions: 0.9.0
>            Reporter: Sean Owen
>            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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