[SPARK-33048] Fix SparkBuild.scala to recognize build settings for Scala 2.13

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.1, 3.1.0
• Fix Version/s: 3.1.0
• Component/s: Build
• Assignee: Kousuke Saruta
• Reporter: Kousuke Saruta
• Created: 02/Oct/20 00:02
• Updated: 12/Dec/22 18:10
• Resolved: 02/Oct/20 06:18

Description

In SparkBuild.scala, a variable 'scalaBinaryVersion' is hardcoded as '2.12'.
So, an environment variable 'SPARK_SCALA_VERSION' is also to be '2.12'.
This issue causes some test suites (e.g. SparkSubmitSuite) to be error.

===== TEST OUTPUT FOR o.a.s.deploy.SparkSubmitSuite: 'user classpath first in driver' =====

20/10/02 08:55:30.234 redirect stderr for command /home/kou/work/oss/spark-scala-2.13/bin/spark-submit INFO Utils: Error: Could not find or load m
ain class org.apache.spark.launcher.Main
20/10/02 08:55:30.235 redirect stderr for command /home/kou/work/oss/spark-scala-2.13/bin/spark-submit INFO Utils: /home/kou/work/oss/spark-scala-
2.13/bin/spark-class: line 96: CMD: bad array subscript

The reason of this error is that environment variables 'SPARK_JARS_DIR' and 'LAUNCH_CLASSPATH' is defined in bin/spark-class as follows.

SPARK_JARS_DIR="${SPARK_HOME}/assembly/target/scala-$SPARK_SCALA_VERSION/jars"
LAUNCH_CLASSPATH="${SPARK_HOME}/launcher/target/scala-$SPARK_SCALA_VERSION/classes:$LAUNCH_CLASSPATH"

Issue Links

• links to: [Github] Pull Request #29927 (sarutak)
• links to: [Github] Pull Request #29927 (sarutak)