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我是 Scala 和 XGBoost 的新手。我从一位在生产中工作的同事那里收到了一个 Gradle Scala 项目，我正在尝试在我的机器上运行它。当我尝试运行时，出现此错误：

Exception in thread "main" java.lang.NoClassDefFoundError: scala/Serializable
(...)
Caused by: java.lang.ClassNotFoundException: scala.Serializable

我对 Scala 比较陌生，但在 Java 方面经验丰富，但我在网上找不到这个错误的好答案。

仅当涉及 XGBoost 库时才会发生此错误，否则项目运行正常。

我还应该提到，我在使用 Metals 从 Visual Studio Code 运行时收到此消息：

2021.12.03 18:11:49 INFO  no build target: using presentation compiler with only scala-library: 2.13.5

摇篮设置：

apply plugin: 'scala'
apply plugin: 'java'
apply plugin: 'idea'

idea {
    module {
        inheritOutputDirs = true
        downloadJavadoc = false
        downloadSources = false
    }
}

sourceCompatibility = 1.11
targetCompatibility = 1.11
def scalaVersion = '2.13.5'
def scalaRelease = scalaVersion.split('\\.').take(2).join('.')

repositories {
    mavenCentral()
    maven {url "https://repository.cloudera.com/artifactory/cloudera-repos/"}
}

//def deploy = 'desm'
def deploy = 'prod'

dependencies {
    if (deploy == 'prod') {
        compileOnly "org.scala-lang:scala-library:$scalaVersion"
        compileOnly group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.11.2'
        compileOnly group: 'com.fasterxml.jackson.module', name: "jackson-module-scala_$scalaRelease", version: '2.11.2'
        compileOnly group: 'org.apache.hbase', name: 'hbase-client', version: '2.1.0-cdh6.3.3'
        compileOnly group: 'org.apache.kafka', name: 'kafka-clients', version: '2.2.1-cdh6.3.3'
    }else if (deploy == 'desm'){
        compile "org.scala-lang:scala-library:$scalaVersion"
        compile group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.11.2'
        compile group: 'com.fasterxml.jackson.module', name: "jackson-module-scala_$scalaRelease", version: '2.11.2'
        compile group: 'org.apache.hbase', name: 'hbase-client', version: '2.1.0-cdh6.3.3'
        compile group: 'org.apache.kafka', name: 'kafka-clients', version: '2.2.1-cdh6.3.3'
    }
    compile group: 'ml.dmlc', name: 'xgboost4j', version: '0.72', {
        exclude group: 'com.typesafe.akka', module: 'akka-actor_2.11'
        exclude group: 'com.typesafe.akka', module: 'akka-testkit_2.11'
        exclude group: 'junit', module: 'junit'
        exclude group: 'org.scala-lang', module: 'scala-compiler'
        exclude group: 'org.scala-lang', module: 'scala-reflect'
        exclude group: 'org.scala-lang', module: 'scala-library'
        exclude group: 'org.scalatest',  module: 'scalatest_2.11'
    }
}

JVM：11.0.13
XGBoost：0.72（我知道这是旧版本）
Scala：2.13.5

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