SpringBoot3下Kafka分组均衡消费实现

首先添加maven依赖：

        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
            <version>2.8.11</version>
            <exclusions>
                <!--此处一定要排除kafka-clients，然后引入低版本client 不然后面分组消费功能会失效！-->
                <exclusion>
                    <groupId>org.apache.kafka</groupId>
                    <artifactId>kafka-clients</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka-clients</artifactId>
            <version>3.1.2</version>
        </dependency>

KafkaMessageListener.java

import lombok.extern.slf4j.Slf4j;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.kafka.annotation.TopicPartition;
import org.springframework.stereotype.Component;

@Component
@Slf4j
public class KafkaMessageListener {
    @KafkaListener(topics = "test-sfk",groupId = "test")
    public void listen5(ConsumerRecord<String, String> message) {
        log.info("5------>Received message: {}", message.value());
    }
    @KafkaListener(topics = "test-sfk",groupId = "test")
    public void listen4(ConsumerRecord<String, String> message) {
        log.info("4------>Received message: {}", message.value());
    }
}

TestController.java 用于发送测试消息

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("test")
public class TestController {
    @Autowired
    private KafkaTemplate<String,Object> kafkaTemplate;
    @GetMapping("kafkaMessage")
    public String kafkaMessage(){
        for (int i = 0; i < 10; i++) {
            kafkaTemplate.send("test-sfk","test:"+i);
        }

        return "ok";
    }
}

启动后调用接口发送消息；此时看到控制台消息输出已经是均衡消费了

2024-03-15T13:49:01.034+08:00  INFO 19548 --- [ntainer#1-0-C-1] c.w.e.k.listener.KafkaMessageListener    : 4------>Received message: test:0
2024-03-15T13:49:01.035+08:00  INFO 19548 --- [ntainer#1-0-C-1] c.w.e.k.listener.KafkaMessageListener    : 4------>Received message: test:1
2024-03-15T13:49:01.035+08:00  INFO 19548 --- [ntainer#1-0-C-1] c.w.e.k.listener.KafkaMessageListener    : 4------>Received message: test:2
2024-03-15T13:49:01.295+08:00  INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener    : 5------>Received message: test:3
2024-03-15T13:49:01.297+08:00  INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener    : 5------>Received message: test:4
2024-03-15T13:49:01.300+08:00  INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener    : 5------>Received message: test:5
2024-03-15T13:49:01.301+08:00  INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener    : 5------>Received message: test:6
2024-03-15T13:49:01.303+08:00  INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener    : 5------>Received message: test:7
2024-03-15T13:49:01.304+08:00  INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener    : 5------>Received message: test:8
2024-03-15T13:49:01.306+08:00  INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener    : 5------>Received message: test:9

一开始不知道，直接引用的spring-kafka依赖，然后就分组消费失败，始终只能被其中一个消费端消费，这里不知道是新版本配置有差异，还是就是新版kafka-clients跟SpringBoot3兼容有问题，特此记录！