Spring Kafka 找不到 Kafka Properties Bean

Question

我想在我的項目中使用 Spring Kafka，其中 spring 啟動版本是 2.2.2.RELEASE，kafka 版本是 2.3.x。

    implementation 'org.springframework.kafka:spring-kafka'

我有我的 KafkaConfig 類和監聽器類設置：

@EnableKafka
@Configuration
public class KafkaConfig {
Config cfg = new Config();


@Bean
public ConsumerFactory<String, String> consumerFactory() {
Map<String, Object> props = new HashMap<>();
props.put(
    ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,
    cfg.getProperty("server"));
props.put(
    ConsumerConfig.GROUP_ID_CONFIG,
    UUID.randomUUID());
props.put(
    ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,
    StringDeserializer.class);
props.put(
    ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,
    StringDeserializer.class);
return new DefaultKafkaConsumerFactory<>(props);
}

@Bean
public ConcurrentKafkaListenerContainerFactory<String, String> kafkaListenerContainerFactory() {
ConcurrentKafkaListenerContainerFactory<String, String> factory = new ConcurrentKafkaListenerContainerFactory();
factory.setConsumerFactory(consumerFactory());
return factory;
}
}

KafkaConsumer.java

@Service
public class KafkaConsumer {
private final Logger LOG = LoggerFactory
  .getLogger(KafkaConsumer.class);

@KafkaListener(topics = "anomaly-topic")
void listener(String message) {
LOG.info("Listener [{}]", message);
}
}

當我嘗試運行我的應用程序時，出現以下異常：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.kafka.KafkaAnnotationDrivenConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'spring.kafka-org.springframework.boot.autoconfigure.kafka.KafkaProperties': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.kafka.KafkaProperties]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/apache/kafka/common/requests/IsolationLevel
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:798) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]

Answer 1

我發現解決方案是禁用 KafkaAutoConfiguration.class，

@SpringBootApplication(exclude = KafkaAutoConfiguration.class)

Answer 2

我也遇到了同樣的情況，原因是因為我有以下庫：

implementation(group="io.confluent", name="kafka-avro-serializer", version="5.5.1")

它帶有自己的5.5.1-ccs版本的kafka-clients ，該kafka-clients被采用並導致兼容性問題。

我通過使用Spring Dependency Management解決了這個問題：

plugins {
    id("org.springframework.boot") version "2.2.2.RELEASE"
    id("io.spring.dependency-management") version "1.0.9.RELEASE"
}

然后運行gradle clean