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Hyukjin Kwon edited comment on SPARK-25036 at 9/7/18 2:15 AM: -------------------------------------------------------------- There are already too many warnings and I assume it's difficult to spot warnings specific to Scala 2.12 given my resent look (https://github.com/apache/spark/pull/21975). Am I correct? I would rather leave this resolved, and fix them in a batch later in a separate ticket. was (Author: hyukjin.kwon): There are already too many warnings and I assume it's difficult to spot warnings specific to Scala 2.12 given my resent look (https://github.com/apache/spark/pull/21975). Am I correct? I would rather leave this resolved, and fix them in a batch. > Scala 2.12 issues: Compilation error with sbt > --------------------------------------------- > > Key: SPARK-25036 > URL: https://issues.apache.org/jira/browse/SPARK-25036 > Project: Spark > Issue Type: Bug > Components: SQL > Affects Versions: 2.4.0 > Reporter: Kazuaki Ishizaki > Assignee: Kazuaki Ishizaki > Priority: Major > > When compiling with sbt, the following errors occur: > There are -two- three types: > 1. {{ExprValue.isNull}} is compared with unexpected type. > 2. {{match may not be exhaustive}} is detected at {{match}} > 3. discarding unmoored doc comment > The first one is more serious since it may also generate incorrect code in > Spark 2.3. > {code:java} > [error] [warn] > /home/ishizaki/Spark/PR/scala212/spark/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/statsEstimation/ValueInterval.scala:63: > match may not be exhaustive. > [error] It would fail on the following inputs: (NumericValueInterval(_, _), > _), (_, NumericValueInterval(_, _)), (_, _) > [error] [warn] def isIntersected(r1: ValueInterval, r2: ValueInterval): > Boolean = (r1, r2) match { > [error] [warn] > [error] [warn] > /home/ishizaki/Spark/PR/scala212/spark/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/statsEstimation/ValueInterval.scala:79: > match may not be exhaustive. > [error] It would fail on the following inputs: (NumericValueInterval(_, _), > _), (_, NumericValueInterval(_, _)), (_, _) > [error] [warn] (r1, r2) match { > [error] [warn] > [error] [warn] > /home/ishizaki/Spark/PR/scala212/spark/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/ApproxCountDistinctForIntervals.scala:67: > match may not be exhaustive. > [error] It would fail on the following inputs: (ArrayType(_, _), _), (_, > ArrayData()), (_, _) > [error] [warn] (endpointsExpression.dataType, endpointsExpression.eval()) > match { > [error] [warn] > [error] [warn] > /home/ishizaki/Spark/PR/scala212/spark/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala:470: > match may not be exhaustive. > [error] It would fail on the following inputs: NewFunctionSpec(_, None, > Some(_)), NewFunctionSpec(_, Some(_), None) > [error] [warn] newFunction match { > [error] [warn] > [error] [warn] > /home/ishizaki/Spark/PR/scala212/spark/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala:94: > org.apache.spark.sql.catalyst.expressions.codegen.ExprValue and String are > unrelated: they will most likely always compare unequal > [error] [warn] if (eval.isNull != "true") { > [error] [warn] > [error] [warn] > /home/ishizaki/Spark/PR/scala212/spark/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala:126: > org.apache.spark.sql.catalyst.expressions.codegen.ExprValue and String are > unrelated: they will most likely never compare equal > [error] [warn] if (eval.isNull == "true") { > [error] [warn] > [error] [warn] > /home/ishizaki/Spark/PR/scala212/spark/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala:133: > org.apache.spark.sql.catalyst.expressions.codegen.ExprValue and String are > unrelated: they will most likely never compare equal > [error] [warn] if (eval.isNull == "true") { > [error] [warn] > [error] [warn] > /home/ishizaki/Spark/PR/scala212/spark/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala:709: > match may not be exhaustive. > [error] It would fail on the following input: Schema((x: > org.apache.spark.sql.types.DataType forSome x not in > org.apache.spark.sql.types.StructType), _) > [error] [warn] def attributesFor[T: TypeTag]: Seq[Attribute] = schemaFor[T] > match { > [error] [warn] > [error] [warn] > /home/ishizaki/Spark/PR/scala212/spark/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala:90: > org.apache.spark.sql.catalyst.expressions.codegen.ExprValue and String are > unrelated: they will most likely never compare equal > [error] [warn] if (inputs.map(_.isNull).forall(_ == "false")) { > [error] [warn] > {code} > {code:java} > [error] [warn] > /home/ishizaki/Spark/PR/scala212/spark/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala:410: > discarding unmoored doc comment > [error] [warn] /** > [error] [warn] > [error] [warn] > /home/ishizaki/Spark/PR/scala212/spark/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala:441: > discarding unmoored doc comment > [error] [warn] /** > [error] [warn] > ... > [error] [warn] > /home/ishizaki/Spark/PR/scala212/spark/resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala:440: > discarding unmoored doc comment > [error] [warn] 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