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  1. Spark
  2. SPARK-1437

Jenkins should build with Java 6

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Details

    • Bug
    • Status: Resolved
    • Minor
    • Resolution: Implemented
    • 0.9.0
    • None
    • Build, Project Infra

    Description

      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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            shaneknapp Shane Knapp
            srowen Sean R. Owen
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