背景：

? ?對kafka消息進行監聽，生產者發了消息，但是消費端沒有接到消息，監聽代碼

消費端，kafka配置

spring.kafka.bootstrap-servers=kafka.cestc.dmp:9591

spring.kafka.properties.sasl.jaas.config=org.apache.kafka.common.security.scram.ScramLoginModule required username="admin" password="Kafka#Cestc2021";

spring.kafka.properties.security.protocol=SASL_PLAINTEXT

spring.kafka.properties.sasl.mechanism=SCRAM-SHA-256

#=============== provider =======================

spring.kafka.producer.retries=0

# 每次批量發送消息的數量

spring.kafka.producer.batch-size=16384

spring.kafka.producer.buffer-memory=33554432

# 指定消息key和消息體的編解碼方式

spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializer

spring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.StringSerializer

#=============== consumer =======================

# 指定默認消費者group id

spring.kafka.consumer.group-id=dq

spring.kafka.consumer.auto-offset-reset=latest

spring.kafka.consumer.enable-auto-commit=true

spring.kafka.consumer.auto-commit-interval=100

# 指定消息key和消息體的編解碼方式

spring.kafka.consumer.key-deserializer=org.apache.kafka.common.serialization.StringDeserializer

spring.kafka.consumer.value-deserializer=org.apache.kafka.common.serialization.StringDeserializer

@KafkaListener(groupId = "${spring.kafka.consumer.group-id:dq}",topics = {"t_dq_rwzt_topic"})
public ReturnT<String> listenKafka2(String records, Acknowledgment ack) {

}

offset explorer發現生產者發送了消息，offset是0

問題解決：

后來查看生產者kafka配置,發現他們的enable-auto-commit是false：

spring.kafka.consumer.enable-auto-commit=false

修改kafka配置

spring.kafka.consumer.enable-auto-commit=false

# 在偵聽器容器中運行的線程數

spring.kafka.listener.concurrency=5

# listner負責ack，每調用commit方法，立即向服務器提交

spring.kafka.listener.ack-mode=manual_immediate