Steve Chong created SPARK-42886: ----------------------------------- Summary: ClassNotFoundException: scala.math.Ordering$Reverse Key: SPARK-42886 URL: https://issues.apache.org/jira/browse/SPARK-42886 Project: Spark Issue Type: Bug Components: Build Affects Versions: 3.3.2 Environment: Development environment
MacBook Pro Java JDK ibm-1.8-362 Reporter: Steve Chong Hi, We are using the spark-mllib_2.12 dependency in a Java project. We are attempting to upgrade from version 3.3.1 to 3.3.2. This results in unit tests breaking with exception: ClassNotFoundException: scala.math.Ordering$Reverse A change was made to add the class to the KyroSerializer https://issues.apache.org/jira/browse/SPARK-42071 scala.math.Ordering$Reverse was introduced int Scala 2.12.12. The maven dependency tree (mvn dependency:tree) shows that spark-mllib_2.12 brings in scala-library version 2.12.8. Therefore, it doesn't contain scala.math.Ordering$Reverse. If the scala-library transitive dependency is excluded from the POM and an explicit dependency declared on with version >=2.12.12, the tests will pass. Should the scala-library version contained in 3.3.2 be upgraded to >=2.12.12? -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org