[英]EmbeddedKafkaBroker set properties throws NoClassDefFoundError: kafka/zk/EmbeddedZookeeper
當我們使用以下命令初始化EmbeddedKafkaBroker時:
EmbeddedKafkaBroker embeddedKafkaBroker = new EmbeddedKafkaBroker(1, true, 1, environment.getProperty("producer_topic"), environment.getProperty("consumer_topic"));
embeddedKafkaBroker.afterPropertiesSet();
第二行拋出:
method 'embeddedKafkaBroker' threw exception; nested exception is java.lang.NoClassDefFoundError: kafka/zk/EmbeddedZookeeper
編輯-添加了依賴項的GAV格式我們已經看到許多有關依賴項不匹配的答案,因此我們檢查了它們。 我們不能放置所有使用的pom,因此這里是相關的依賴項:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-test</artifactId>
<version>1.5.6.RELEASE</version>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.1.3.RELEASE</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka-test</artifactId>
<version>2.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
<version>2.2.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.11</artifactId>
<version>2.2.0</version>
<exclusions>
<exclusion>
<artifactId>kafka-clients</artifactId>
<groupId>org.apache.kafka</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-streams</artifactId>
<version>2.0.1</version>
</dependency>
有任何想法嗎?
您以某種方式缺少kafka_2.11-2.2.0-test.jar; 它通常是通過春季卡夫卡測試傳遞的。
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.12</artifactId>
<version>2.2.0</version>
<classifier>test</classifier>
<scope>test</scope>
</dependency>
順便說一句,建議在2.x客戶端上使用scala 2_12。
另外,您的kafka-streams
jar必須與kafka-clients
相同版本。
有關如何覆蓋依賴項的信息,請參閱Spring for Apache Kafka參考手冊附錄 。
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
<version>${spring.kafka.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka-test</artifactId>
<version>${spring.kafka.version}</version>
<exclusions>
<exclusion>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.11</artifactId>
</exclusion>
</exclusions>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>2.2.0</version>
<classifier>test</classifier>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.12</artifactId>
<version>2.2.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.12</artifactId>
<version>2.2.0</version>
<classifier>test</classifier>
<scope>test</scope>
</dependency>
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