[SPARK-27682] Avoid use of Scala collection classes that are removed in 2.13

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: ML, MLlib, Spark Core, SQL
• Assignee: Sean R. Owen
• Reporter: Sean R. Owen
• Created: 11/May/19 01:13
• Updated: 15/May/19 14:32
• Resolved: 15/May/19 14:29

Description

Scala 2.13 will remove several collection classes like MutableList. We should avoid using them and replace with similar classes proactively.

Issue Links

• links to: GitHub Pull Request #24586