即使在特定配置之后,Spring Cloud Kafka 流也不会在反序列化错误时重试。期望是,它应该根据配置的重试策略重试,最后将失败的消息推送到 DLQ。
配置如下。
spring.cloud.stream.bindings.input_topic.consumer.maxAttempts=7
spring.cloud.stream.bindings.input_topic.consumer.backOffInitialInterval=500
spring.cloud.stream.bindings.input_topic.consumer.backOffMultiplier=10.0
spring.cloud.stream.bindings.input_topic.consumer.backOffMaxInterval=100000
spring.cloud.stream.bindings.iinput_topic.consumer.defaultRetryable=true
public interface MyStreams {
String INPUT_TOPIC = "input_topic";
String INPUT_TOPIC2 = "input_topic2";
String ERROR = "apperror";
String OUTPUT = "output";
@Input(INPUT_TOPIC)
KStream<String, InObject> inboundTopic();
@Input(INPUT_TOPIC2)
KStream<Object, InObject> inboundTOPIC2();
@Output(OUTPUT)
KStream<Object, outObject> outbound();
@Output(ERROR)
MessageChannel outboundError();
}
@StreamListener(MyStreams.INPUT_TOPIC)
@SendTo(MyStreams.OUTPUT)
public KStream<Key, outObject> processSwft(KStream<Key, InObject> myStream) {
return myStream.mapValues(this::transform);
}
KafkaTopicProvisioner.java 中的 metadataRetryOperations 始终为空,因此它在afterPropertiesSet().
public KafkaTopicProvisioner(KafkaBinderConfigurationProperties kafkaBinderConfigurationProperties, KafkaProperties kafkaProperties) {
Assert.isTrue(kafkaProperties != null, "KafkaProperties cannot be null");
this.adminClientProperties = kafkaProperties.buildAdminProperties();
this.configurationProperties = kafkaBinderConfigurationProperties;
this.normalalizeBootPropsWithBinder(this.adminClientProperties, kafkaProperties, kafkaBinderConfigurationProperties);
}
public void setMetadataRetryOperations(RetryOperations metadataRetryOperations) {
this.metadataRetryOperations = metadataRetryOperations;
}
public void afterPropertiesSet() throws Exception {
if (this.metadataRetryOperations == null) {
RetryTemplate retryTemplate = new RetryTemplate();
SimpleRetryPolicy simpleRetryPolicy = new SimpleRetryPolicy();
simpleRetryPolicy.setMaxAttempts(10);
retryTemplate.setRetryPolicy(simpleRetryPolicy);
ExponentialBackOffPolicy backOffPolicy = new ExponentialBackOffPolicy();
backOffPolicy.setInitialInterval(100L);
backOffPolicy.setMultiplier(2.0D);
backOffPolicy.setMaxInterval(1000L);
retryTemplate.setBackOffPolicy(backOffPolicy);
this.metadataRetryOperations = retryTemplate;
}
}