没有可用于字符串的 TypeTag

Question

我正在尝试使用scala -classpath "target/scala-2.13/Capstone-assembly-0.1.0-SNAPSHOT.jar" src/main/scala/project/Main.scala运行我的胖 jar，但我得到一个错误导致by .toString: val generateUUID: UserDefinedFunction = udf((str: String) => nameUUIDFromBytes(str.getBytes).toString) No TypeTag available for String ，当我从 IDE 运行时一切正常，但不能从 jar

我的build.sbt ：

ThisBuild / version := "0.1.0-SNAPSHOT"

ThisBuild / scalaVersion := "2.13.8"

lazy val root = (project in file("."))
  .settings(
    name := "Capstone"
  )

libraryDependencies ++= Seq(
  "org.apache.spark" %% "spark-core" % "3.2.0",
  "org.apache.spark" %% "spark-sql" % "3.2.0",
  "org.scalatest" %% "scalatest" % "3.2.12" % "test",
  "org.rogach" %% "scallop" % "4.1.0"
)
compileOrder := CompileOrder.JavaThenScala

assemblyMergeStrategy in assembly := {
  case PathList("META-INF", xs @ _*) => MergeStrategy.discard
  case x => MergeStrategy.first
}

如果我删除 .toString，则会收到错误Schema for type java.util.UUID is not supported

我试图将 String 更改为 java.util.String 或 scala.Predef.String，但这不起作用