Neo4j-harness为Scala抛出java noclass deffound异常。可序列化

Question

当尝试使用neo4j-harness测试neo4j服务器时，我在构建嵌入式Neo4j服务器时收到noclass deffound异常

private final Neo4j embeddedNeo4jServer = Neo4jBuilders.newInProcessBuilder()
        .withDisabledServer()
        .withFixture("")
        .build(); // exception here

我的pom.xml是这样的：

xml prettyprint-override">  <dependencies>
  
    <!-- Core Dependencies -->
    
        <dependency><groupId>org.neo4j.driver</groupId><artifactId>neo4j-java-driver</artifactId><version>4.4.5</version></dependency>
        <dependency><groupId>org.apache.kafka</groupId><artifactId>kafka-streams</artifactId><version>3.0.0</version></dependency>
        <dependency><groupId>org.apache.curator</groupId><artifactId>curator-x-discovery</artifactId><version>4.2.0</version></dependency>
        <dependency><groupId>org.json</groupId><artifactId>json</artifactId><version>20211205</version></dependency>
        <dependency><groupId>org.slf4j</groupId><artifactId>slf4j-simple</artifactId><version>1.7.30</version></dependency>
        
    <!-- Test Dependencies -->
        
        <dependency><groupId>org.junit.jupiter</groupId><artifactId>junit-jupiter</artifactId><version>5.8.2</version><scope>test</scope></dependency>
        <dependency><groupId>org.skyscreamer</groupId><artifactId>jsonassert</artifactId><version>1.5.0</version><scope>test</scope></dependency>
        <dependency><groupId>org.neo4j.test</groupId><artifactId>neo4j-harness</artifactId><version>4.4.5</version><scope>test</scope></dependency>
        
        <!-- Spring dependencies for an embedded Kafka instance -->
        <dependency><groupId>org.springframework.kafka</groupId><artifactId>spring-kafka</artifactId><version>2.8.3</version><scope>test</scope></dependency>
        <dependency><groupId>org.springframework.kafka</groupId><artifactId>spring-kafka-test</artifactId><scope>test</scope><version>2.8.3</version></dependency>
        <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope><version>2.6.4</version>
            <exclusions><exclusion><groupId>org.junit.vintage</groupId><artifactId>junit-vintage-engine</artifactId></exclusion></exclusions></dependency>
        
        <!-- Mockito dependencies - NOTE: the inline dependency replaces the core one, but might be removed in future versions-->
        <!--<dependency><groupId>org.mockito</groupId><artifactId>mockito-core</artifactId><version>4.4.0</version><scope>test</scope></dependency>-->
        <dependency><groupId>org.mockito</groupId><artifactId>mockito-junit-jupiter</artifactId><version>4.4.0</version><scope>test</scope></dependency>
        <dependency><groupId>org.mockito</groupId><artifactId>mockito-inline</artifactId><version>4.4.0</version><scope>test</scope></dependency>
  </dependencies>

Answer 1

在SpringKafka测试和neo4j线束中使用的scala库版本发生冲突。

要解决这个问题，您可以从spring-kafka-test中排除scala依赖项，这意味着neo4j-harness版本将用于两者。

为此，在pom.xml中添加排除：

<dependency><groupId>org.springframework.kafka</groupId><artifactId>spring-kafka-test</artifactId><scope>test</scope><version>2.8.3</version>
            <exclusions><exclusion><groupId>org.scala-lang</groupId><artifactId>scala-library</artifactId></exclusion></exclusions></dependency>