[jira] [Resolved] (SPARK-29292) Fix internal usages of mutable collection for Seq in 2.13

["Dongjoon Hyun (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-29292?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dongjoon Hyun resolved SPARK-29292.
-----------------------------------
    Fix Version/s: 3.1.0
       Resolution: Fixed

Issue resolved by pull request 28971
[https://github.com/apache/spark/pull/28971]

> Fix internal usages of mutable collection for Seq in 2.13
> ---------------------------------------------------------
>
>                 Key: SPARK-29292
>                 URL: https://issues.apache.org/jira/browse/SPARK-29292
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Spark Core
>    Affects Versions: 3.0.0
>            Reporter: Sean R. Owen
>            Assignee: Sean R. Owen
>            Priority: Minor
>             Fix For: 3.1.0
>
>
> Kind of related to https://issues.apache.org/jira/browse/SPARK-27681, but a simpler subset. 
> In 2.13, a mutable collection can't be returned as a {{scala.collection.Seq}}. It's easy enough to call .toSeq on these as that still works on 2.12.
> {code}
> [ERROR] [Error] /Users/seanowen/Documents/spark_2.13/core/src/main/scala/org/apache/spark/ExecutorAllocationManager.scala:467: type mismatch;
>  found   : Seq[String] (in scala.collection) 
>  required: Seq[String] (in scala.collection.immutable) 
> {code}



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