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

["Kousuke Saruta (Jira)" <ji...@apache.org>]

Kousuke Saruta created SPARK-33048:
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             Summary: Fix SparkBuild.scala to recognize build settings for Scala 2.13
                 Key: SPARK-33048
                 URL: https://issues.apache.org/jira/browse/SPARK-33048
             Project: Spark
          Issue Type: Sub-task
          Components: Build
    Affects Versions: 3.0.1, 3.1.0
            Reporter: Kousuke Saruta
            Assignee: Kousuke Saruta


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.

{code}
===== 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
{code}

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



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