[SPARK-26144] `build/mvn` should detect `scala.version` based on `scala.binary.version`

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: Build
• Assignee: Dongjoon Hyun
• Reporter: Dongjoon Hyun
• Created: 22/Nov/18 08:51
• Updated: 22/Nov/18 22:50
• Resolved: 22/Nov/18 22:50

Description

Currently, `build/mvn` download and use `2.12.7` in `Scala-2.11` Jenkins job. The root cause is `build/mvn` got the first match from `pom.xml` blindly.

• https://amplab.cs.berkeley.edu/jenkins/view/Spark%20QA%20Test%20(Dashboard)/job/spark-master-test-maven-hadoop-2.7-ubuntu-scala-2.11/6/consoleFull

  exec: curl -s -L https://downloads.lightbend.com/zinc/0.3.15/zinc-0.3.15.tgz
  exec: curl -s -L https://downloads.lightbend.com/scala/2.12.7/scala-2.12.7.tgz
  exec: curl -s -L https://www.apache.org/dyn/closer.lua?action=download&filename=/maven/maven-3/3.5.4/binaries/apache-maven-3.5.4-bin.tar.gz

Issue Links

• links to: [Github] Pull Request #23118 (dongjoon-hyun)