[jira] [Comment Edited] (SPARK-27681) Use scala.collection.Seq explicitly instead of scala.Seq alias

["Marcelo Vanzin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-27681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16837752#comment-16837752 ] 

Marcelo Vanzin edited comment on SPARK-27681 at 5/11/19 4:28 AM:
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Also the change you're proposing likely would break source compatibility, which would make upgrading to Spark + Scala 2.13 harder than just a recompile...


was (Author: vanzin):
Also the change you're proposing likely would break source compatibility, which would make upgrading to Spark 3 harder than just a recompile...

> Use scala.collection.Seq explicitly instead of scala.Seq alias
> --------------------------------------------------------------
>
>                 Key: SPARK-27681
>                 URL: https://issues.apache.org/jira/browse/SPARK-27681
>             Project: Spark
>          Issue Type: Sub-task
>          Components: ML, MLlib, Spark Core, SQL, Structured Streaming
>    Affects Versions: 3.0.0
>            Reporter: Sean Owen
>            Assignee: Sean Owen
>            Priority: Major
>
> {{scala.Seq}} is widely used in the code, and is an alias for {{scala.collection.Seq}} in Scala 2.12. It will become an alias for {{scala.collection.immutable.Seq}} in Scala 2.13. To avoid API changes, we should simply explicit import and use {{scala.collection.Seq}}.



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