java.lang.ClassNotFoundException: org.apache.kafka.clients.consumer.ConsumerGroupMetadata
java.lang.ClassNotFoundException: org.apache.kafka.clients.consumer.ConsumerGroupMetadata
我正在尝试创建一个简单的 Kafka 生产者。因为我是这个主题的新手,所以我遵循了一个教程。我按照视频中的建议创建了一个配置文件。这是我正在使用的配置文件。
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.common.serialization.StringSerializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.core.DefaultKafkaProducerFactory;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.kafka.core.ProducerFactory;
import org.springframework.kafka.support.serializer.JsonSerializer;
import java.util.HashMap;
import java.util.Map;
@Configuration
public class KafkaProducerConfig {
@Bean
public ProducerFactory<String, KafkaProducerModel> producerFactory() {
Map<String, Object> config = new HashMap<>();
config.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "127.0.0.1:9092");
config.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
config.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, JsonSerializer.class);
return new DefaultKafkaProducerFactory<>(config);
}
@Bean
public KafkaTemplate<String, KafkaProducerModel> kafkaTemplate() {
return new KafkaTemplate<>(producerFactory());
}
}
当我尝试 运行 我的应用程序时出现以下错误。
Caused by: java.lang.ClassNotFoundException: org.apache.kafka.clients.consumer.ConsumerGroupMetadata
at jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) ~[?:?]
at jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[?:?]
at java.lang.Class.getDeclaredMethods0(Native Method) ~[?:?]
at java.lang.Class.privateGetDeclaredMethods(Class.java:3166) ~[?:?]
at java.lang.Class.getDeclaredMethods(Class.java:2309) ~[?:?]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463) ~[spring-core-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321) ~[spring-core-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.buildPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:438) ~[spring-orm-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:409) ~[spring-orm-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(PersistenceAnnotationBeanPostProcessor.java:336) ~[spring-orm-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1094) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:569) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
... 15 more
它是一个 gradle 项目,这里是依赖项
implementation 'org.springframework.kafka:spring-kafka:2.5.6.RELEASE'
我确实在查看 stackover 流线程后添加了依赖项。但是它没有解决错误。任何线索都会有所帮助。
implementation 'org.apache.tomcat.embed:tomcat-embed-core'
您的类路径中的 kafka-clients
版本似乎有误。 spring-kafka 2.5.6 使用 kafka-clients 2.5.1。你不应该自己声明版本,Spring Boot 会引入正确的版本。
Spring Boot 2.3.4 将引入此版本的 spring-kafka 及其依赖项。如果您使用的是较旧的启动,则需要覆盖所有依赖项。
我正在尝试创建一个简单的 Kafka 生产者。因为我是这个主题的新手,所以我遵循了一个教程。我按照视频中的建议创建了一个配置文件。这是我正在使用的配置文件。
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.common.serialization.StringSerializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.core.DefaultKafkaProducerFactory;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.kafka.core.ProducerFactory;
import org.springframework.kafka.support.serializer.JsonSerializer;
import java.util.HashMap;
import java.util.Map;
@Configuration
public class KafkaProducerConfig {
@Bean
public ProducerFactory<String, KafkaProducerModel> producerFactory() {
Map<String, Object> config = new HashMap<>();
config.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "127.0.0.1:9092");
config.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
config.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, JsonSerializer.class);
return new DefaultKafkaProducerFactory<>(config);
}
@Bean
public KafkaTemplate<String, KafkaProducerModel> kafkaTemplate() {
return new KafkaTemplate<>(producerFactory());
}
}
当我尝试 运行 我的应用程序时出现以下错误。
Caused by: java.lang.ClassNotFoundException: org.apache.kafka.clients.consumer.ConsumerGroupMetadata
at jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) ~[?:?]
at jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[?:?]
at java.lang.Class.getDeclaredMethods0(Native Method) ~[?:?]
at java.lang.Class.privateGetDeclaredMethods(Class.java:3166) ~[?:?]
at java.lang.Class.getDeclaredMethods(Class.java:2309) ~[?:?]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463) ~[spring-core-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321) ~[spring-core-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.buildPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:438) ~[spring-orm-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:409) ~[spring-orm-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(PersistenceAnnotationBeanPostProcessor.java:336) ~[spring-orm-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1094) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:569) ~[spring-beans-5.2.5.RELEASE.jar:5.2.5.RELEASE]
... 15 more
它是一个 gradle 项目,这里是依赖项
implementation 'org.springframework.kafka:spring-kafka:2.5.6.RELEASE'
我确实在查看 stackover 流线程后添加了依赖项。但是它没有解决错误。任何线索都会有所帮助。
implementation 'org.apache.tomcat.embed:tomcat-embed-core'
您的类路径中的 kafka-clients
版本似乎有误。 spring-kafka 2.5.6 使用 kafka-clients 2.5.1。你不应该自己声明版本,Spring Boot 会引入正确的版本。
Spring Boot 2.3.4 将引入此版本的 spring-kafka 及其依赖项。如果您使用的是较旧的启动,则需要覆盖所有依赖项。