Question

我正在使用spring-Kafka-2.1.5和spring-boot-2.0.5

开发微服务

第一个服务将向kafka生成一些消息，第二个服务将消耗它们，而消耗我遇到的问题

Caused by: java.lang.IllegalArgumentException: The class 'com.service1.model.TopicMessage' is not in the trusted packages: [java.util, java.lang, com.service2.model.ConsumeMessage]. 
If you believe this class is safe to deserialize, please provide its name. If the serialization is only done by a trusted source, you can also enable trust all (*).

因此，根据错误消息，这是service1的com.service1.model.TopicMessage序列化模型。但是我试图将消息反序列化为服务{2}中存在的模型com.service2.model.ConsumeMessage，并遇到了这个问题

我发现了相同的问题here，并尝试使用以下格式以及文档docs

下面是我的配置

  @Bean(name = "kafkaConsumerConfig")
   public Map<String, Object> kafkaConsumerConfig() {

    Map<String, Object> props = new HashMap<>();

    props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
    props.put(ConsumerConfig.GROUP_ID_CONFIG, groupId);
    props.put(ConsumerConfig.CLIENT_ID_CONFIG, clientId);
    props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, offsetconfig);
    props.put(ConsumerConfig.AUTO_COMMIT_INTERVAL_MS_CONFIG, autoCommitInterval);
    props.put(ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG, sessionTimeout);
    props.put(ConsumerConfig.MAX_POLL_RECORDS_CONFIG, maxPollRecords);
    props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, enableAutoCommit);

     }

kafkaConsumerFactory

@Bean(name = "kafkaConsumerFactory")
public ConsumerFactory<String, ConsumeMessage> kafkaConsumerFactory()        {

    JsonDeserializer<ConsumeMessage> 
    deserializer = new JsonDeserializer<>();
    deserializer.addTrustedPackages("com.service2.model");
return new DefaultKafkaConsumerFactory<String, ConsumeMessage>(kafkaConsumerConfig(),new StringDeserializer(),deserializer);

}

kafkaListenerContainerFactory

 @Bean(name = "kafkaListenerContainerFactory")
 public ConcurrentKafkaListenerContainerFactory<String, ConsumeMessage > kafkaListenerContainerFactory() {

    ConcurrentKafkaListenerContainerFactory<String, ConsumeMessage > factory = new ConcurrentKafkaListenerContainerFactory<>();

    factory.setConcurrency(Integer.parseInt(threads));
    factory.setBatchListener(true);
    factory.setConsumerFactory(kafkaConsumerFactory());
    factory.getContainerProperties().setPollTimeout(Long.parseLong(pollTimeout));
    factory.getContainerProperties().setAckMode(AckMode.BATCH);

    return factory;
}

Answer 1

您需要在反序列化器中禁用header precedence：

/**
 * Construct an instance with the provided target type, and
 * useHeadersIfPresent with a default {@link ObjectMapper}.
 * @param targetType the target type.
 * @param useHeadersIfPresent true to use headers if present and fall back to target
 * type if not.
 * @since 2.2
 */
public JsonDeserializer(Class<? super T> targetType, boolean useHeadersIfPresent) {

useHeadersIfPresent参数必须配置为false。这样，将使用inferred类型，而标题值将被忽略。

如果您不使用spring-kafka-2.2，则应考虑使用类似的逻辑来实现自己的JsonDeserializer：https://github.com/spring-projects/spring-kafka/blob/master/spring-kafka/src/main/java/org/springframework/kafka/support/serializer/JsonDeserializer.java

spring Kafka模型不在受信任的软件包中

1 个答案: