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Posted to issues@spark.apache.org by "Sean Owen (JIRA)" <ji...@apache.org> on 2019/08/14 20:37:00 UTC

[jira] [Commented] (SPARK-28683) Upgrade Scala to 2.12.10

    [ https://issues.apache.org/jira/browse/SPARK-28683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16907606#comment-16907606 ] 

Sean Owen commented on SPARK-28683:
-----------------------------------

I think we can detach this from the JDK 11 umbrella. This doesn't appear to be strictly necessary for JDK 11 in Spark.

> Upgrade Scala to 2.12.10
> ------------------------
>
>                 Key: SPARK-28683
>                 URL: https://issues.apache.org/jira/browse/SPARK-28683
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Build
>    Affects Versions: 3.0.0
>            Reporter: Yuming Wang
>            Priority: Major
>
> *Note that we tested 2.12.9 via https://github.com/apache/spark/pull/25404 and found that 2.12.9 has a serious bug, https://github.com/scala/bug/issues/11665 *
> We will skip 2.12.9 and try to upgrade 2.12.10 directly in this PR.
> h3. Highlights (2.12.9)
>  * Faster compiler: [5–10% faster since 2.12.8|https://scala-ci.typesafe.com/grafana/dashboard/db/scala-benchmark?orgId=1&from=1543097847070&to=1564631199344&var-branch=2.12.x&var-source=All&var-bench=HotScalacBenchmark.compile&var-host=scalabench%40scalabench%40], thanks to many optimizations (mostly by Jason Zaugg and Diego E. Alonso-Blas: kudos!)
>  * Improved compatibility with JDK 11, 12, and 13
>  * Experimental support for build pipelining and outline type checking
> [https://github.com/scala/scala/releases/tag/v2.12.9]



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