scala - java.lang.NoClassDefFoundError : com/typesafe/config/ConfigFactory when packaging Scala project with Maven 错误

Question

这个问题是this thread的延续.

我遇到的问题是指使用 Maven 打包 Scala Spark 项目。

当我运行这个命令时:

spark-submit --name 28 --master local[2] --class org.test.consumer.TestRunner \
/usr/tests/test1/target/test_service-1.0-SNAPSHOT.jar \
$arg1 $arg2 $arg3 $arg4 $arg5

...，我收到以下错误:

Exception in thread "main" java.lang.NoClassDefFoundError: com/typesafe/config/ConfigFactory
    at org.test.consumer.kafka.KafkaConsumer.<init>(KafkaConsumer.scala:38)
    at org.test.consumer.TestRunner$.main(TestRunner.scala:19)
    at org.test.consumer.TestRunner.main(TestRunner.scala)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:729)
    at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:185)
    at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:210)
    at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:124)
    at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: java.lang.ClassNotFoundException: com.typesafe.config.ConfigFactory
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 12 more

这是我当前的 pom.xml，它考虑了上述线程的建议(我检查生成的 jar 包含 scala 类):

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.test.consumer</groupId>
    <artifactId>test_service</artifactId>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <java.version>1.8</java.version>
        <scala.version>2.11.8</scala.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-library</artifactId>
            <version>${scala.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-streaming_2.11</artifactId>
            <version>1.6.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-streaming-kafka_2.11</artifactId>
            <version>1.6.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.module</groupId>
            <artifactId>jackson-module-scala_2.11</artifactId>
            <version>2.7.5</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.7.5</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.7.5</version>
        </dependency>
        <dependency>
            <groupId>org.sedis</groupId>
            <artifactId>sedis_2.11</artifactId>
            <version>1.2.2</version>
        </dependency>
        <dependency>
            <groupId>com.lambdaworks</groupId>
            <artifactId>jacks_2.11</artifactId>
            <version>2.3.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-sql_2.11</artifactId>
            <version>1.6.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-mllib-local_2.11</artifactId>
            <version>2.0.0</version>
        </dependency>
        <dependency>
            <groupId>com.github.nscala-time</groupId>
            <artifactId>nscala-time_2.11</artifactId>
            <version>2.12.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <!-- Configure maven-compiler-plugin to use the desired Java version -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>

            <!-- Use build-helper-maven-plugin to add Scala source and test source directories -->
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>build-helper-maven-plugin</artifactId>
                <version>1.10</version>
                <executions>
                    <execution>
                        <id>add-source</id>
                        <phase>generate-sources</phase>
                        <goals>
                            <goal>add-source</goal>
                        </goals>
                        <configuration>
                            <sources>
                                <source>src/main/scala</source>
                            </sources>
                        </configuration>
                    </execution>
                    <execution>
                        <id>add-test-source</id>
                        <phase>generate-test-sources</phase>
                        <goals>
                            <goal>add-test-source</goal>
                        </goals>
                        <configuration>
                            <sources>
                                <source>src/test/scala</source>
                            </sources>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

            <!-- Use scala-maven-plugin for Scala support -->
            <plugin>
                <groupId>net.alchim31.maven</groupId>
                <artifactId>scala-maven-plugin</artifactId>
                <version>3.2.2</version>
                <executions>
                    <execution>
                        <goals>
                            <!-- Need to specify this explicitly, otherwise plugin won't be called when doing e.g. mvn compile -->
                            <goal>compile</goal>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

Answer 1

将此添加到您的 pom.xml。

<dependency>
    <groupId>com.typesafe</groupId>
    <artifactId>config</artifactId>
    <version>1.3.1</version>
</dependency>

请注意，如果这个 jar 已经存在，则您不必添加它。

看起来 jar 应该是一个可执行的 jar，所有依赖项都打包在 jar 文件中。您将不得不使用 maven assembly plugin这样做。

  <build>
    <plugins>
      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>single</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
          <archive>
            <manifest>
              <mainClass>org.sample.App</mainClass>    // put your main class here.
            </manifest>
          </archive>
        </configuration>
      </plugin>
    </plugins>
  </build>

此插件将创建一个额外的 jar(除了常规 jar)，其名称附加 -jar-with-dependencies。使用此 jar 而不是使用原始 jar。