[jira] [Commented] (SPARK-24421) sun.misc.Unsafe in JDK11

["DB Tsai (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-24421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16680117#comment-16680117 ] 

DB Tsai commented on SPARK-24421:
---------------------------------

[~srowen] Great news! Thanks for looking at this. 

Out of my curiosity, can the tests run in JVM11 if we build Spark with JDK8? Similarly, can we run the tests in JVM8 if the Spark is built with JDK11 with Java 8 target?

For release, which version of the JDK should we use?

> sun.misc.Unsafe in JDK11
> ------------------------
>
>                 Key: SPARK-24421
>                 URL: https://issues.apache.org/jira/browse/SPARK-24421
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Build
>    Affects Versions: 2.3.0
>            Reporter: DB Tsai
>            Priority: Major
>
> Many internal APIs such as unsafe are encapsulated in JDK9+, see http://openjdk.java.net/jeps/260 for detail.
> To use Unsafe, we need to add *jdk.unsupported* to our code’s module declaration:
> {code:java}
> module java9unsafe {
>     requires jdk.unsupported;
> }
> {code}



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