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https://issues.apache.org/jira/browse/SPARK-25075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16837260#comment-16837260
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Guillaume Massé commented on SPARK-25075:
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Supporting both Scala 2.12 and Scala 2.13 will be an interesting chalenge. You
can take a look at our work in Akka: [https://github.com/akka/akka/pull/26043.]
To make the transition easier, there is a library and a bunch of scalafix
migration rules. Take a look at:
[https://github.com/scala/scala-collection-compat.] See also the migration
guide at:
[https://docs.scala-lang.org/overviews/core/collections-migration-213.html]
I took a quick look, and there is a few Traversable instances in the public
API. There is also a bunch of scala.Seq. This will makes things harder to
migrate. Based on the version policy
(https://spark.apache.org/versioning-policy.html), this would require a bump to
Spark 4.X
> Build and test Spark against Scala 2.13
> ---------------------------------------
>
> Key: SPARK-25075
> URL: https://issues.apache.org/jira/browse/SPARK-25075
> Project: Spark
> Issue Type: Umbrella
> Components: Build, Project Infra
> Affects Versions: 3.0.0
> Reporter: Guillaume Massé
> Priority: Major
>
> This umbrella JIRA tracks the requirements for building and testing Spark
> against the current Scala 2.13 milestone.
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