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server:
port: 8120
# v1
spring:
Kafka:
bootstrap-servers: 192.168.74.148:9095,192.168.74.148:9096,192.168.74.148:9097
consumer:
# read-committed读事务已提交的消息 解决脏读问题
isolation-level: read-committed # 消费者的事务隔离级别:read-uncommitted会导致脏读,可以读取生产者事务还未提交的消息
# 消费者是否自动ack :true自动ack 消费者获取到消息后kafka提交消费者偏移量
# 调用ack方法时才会提交ack给kafka
# enable-auto-commit: false
# 消费者提交ack时多长时间批量提交一次
auto-commit-interval: 1000
# 消费者第一次消费主题消息时从哪个位置开始
# earliest:从最早的消息开始消费
# latest:第一次从LEO位置开始消费
# none:如果主题分区没有偏移量,则抛出异常
auto-offset-reset: earliest #指定Offset消费:earliest | latest | none
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
listener:
# 手动ack:manual手动ack时 如果有异常会尝试一直消费
# ack-mode: manual
# 手动ack:消费有异常时停止
ack-mode: manual_immediate
package com.atguigu.spring.kafka.consumer.config;
import org.apache.kafka.clients.admin.NewTopic;
import org.apache.kafka.clients.consumer.Consumer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.config.TopicBuilder;
import org.springframework.kafka.listener.ConsumerAwareListenerErrorHandler;
import org.springframework.kafka.listener.ListenerExecutionFailedException;
import org.springframework.messaging.Message;
@Configuration
public class MyKafkaConfig {
@Bean
public NewTopic springTestPartitionTopic() {
return TopicBuilder.name("my_topic1") //主题名称
.partitions(3) //分区数量
.replicas(3) //副本数量
.build();
}
//方法名就是注入到容器中对象的名称
@Bean
public ConsumerAwareListenerErrorHandler myErrorHandler() {
//创建异常处理器:消费者异常时 且注册使用当前异常处理器 会生效
return new ConsumerAwareListenerErrorHandler() {
@Override
public Object handleError(Message<?> message, ListenerExecutionFailedException e, Consumer<?, ?> consumer) {
System.out.println("出现异常,消息内容:value = " + message.getPayload());
System.out.println("header = "+message.getHeaders());
System.out.println("异常信息:" + e.getMessage());
System.out.println("=================");
return null;
}
};
}
}
package com.atguigu.spring.kafka.consumer.listener;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.kafka.annotation.TopicPartition;
import org.springframework.kafka.support.Acknowledgment;
import org.springframework.stereotype.Component;
@Component
public class MyKafkaListenerAck {
/**
* 自动ack可能会导致漏消息
* spring-kafka:
* 自动ack 如果有异常,会死循环获取消息重新消费
* 不能继续向后消费消息,会导致消息积压
*
* 手动ack 配置了手动ack,且ack-mode为manual_immediate时,
* 如果消息消费失败,会继续向后消费
* @param record
*/
@KafkaListener(
topicPartitions = {
@TopicPartition(topic = "my_topic1",partitions = {"0"})}
, groupId = "my_group1",errorHandler = "myErrorHandler")
public void onMessage1(ConsumerRecord<String, String> record, Acknowledgment acknowledgment) {
System.out.println("my_group1消费者获取分区0的消息:topic = "+ record.topic()
+",partition:"+record.partition()
+",offset = "+record.offset()
+",key = "+record.key()
+",value = "+record.value());
int i = 1/0;
// 手动ack:手动确认消息已经消费 broker 会提交消费者偏移量
acknowledgment.acknowledge();
}
}
package com.atguigu.spring.kafka.consumer;
import jakarta.annotation.Resource;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.kafka.core.KafkaTemplate;
@SpringBootTest
class SpringKafkaConsumerApplicationTests {
@Resource
KafkaTemplate kafkaTemplate;
@Test
void contextLoads() {
for (int i = 0; i < 10; i++) {
kafkaTemplate.send("my_topic1",i%3,"", "指定ack-mode: manual_immediate消费"+i);
}
}
}
package com.atguigu.spring.kafka.consumer;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
// Generated by https://start.springboot.io
// 优质的 spring/boot/data/security/cloud 框架中文文档尽在 => https://springdoc.cn
@SpringBootApplication
public class SpringKafkaConsumerApplication {
public static void main(String[] args) {
SpringApplication.run(SpringKafkaConsumerApplication.class, args);
}
}
<configuration>
<!-- 如果觉得idea控制台日志太多,src\main\resources目录下新建logback.xml
屏蔽kafka debug -->
<logger name="org.apache.kafka.clients" level="debug" />
</configuration>
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>3.0.5</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<!-- Generated by https://start.springboot.io -->
<!-- 优质的 spring/boot/data/security/cloud 框架中文文档尽在 => https://springdoc.cn -->
<groupId>com.atguigu</groupId>
<artifactId>spring-kafka-consumer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spring-kafka-consumer</name>
<description>spring-kafka-consumer</description>
<properties>
<java.version>17</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v3.0.5)
my_group1消费者获取分区0的消息:topic = my_topic1,partition:0,offset = 0,key = ,value = 指定ack-mode: manual_immediate消费0
出现异常,消息内容:value = ConsumerRecord(topic = my_topic1, partition = 0, leaderEpoch = 0, offset = 0, CreateTime = 1717672170845, serialized key size = 0, serialized value size = 39, headers = RecordHeaders(headers = [], isReadOnly = false), key = , value = 指定ack-mode: manual_immediate消费0)
header = {id=91c96206-2381-5fa1-b391-52627056762f, timestamp=1717672488753}
异常信息:Listener method 'public void com.atguigu.spring.kafka.consumer.listener.MyKafkaListenerAck.onMessage1(org.apache.kafka.clients.consumer.ConsumerRecord<java.lang.String, java.lang.String>,org.springframework.kafka.support.Acknowledgment)' threw exception
=================
my_group1消费者获取分区0的消息:topic = my_topic1,partition:0,offset = 1,key = ,value = 指定ack-mode: manual_immediate消费3
出现异常,消息内容:value = ConsumerRecord(topic = my_topic1, partition = 0, leaderEpoch = 0, offset = 1, CreateTime = 1717672170855, serialized key size = 0, serialized value size = 39, headers = RecordHeaders(headers = [], isReadOnly = false), key = , value = 指定ack-mode: manual_immediate消费3)
header = {id=8755d954-615c-37ff-67f0-85521e090b03, timestamp=1717672488753}
异常信息:Listener method 'public void com.atguigu.spring.kafka.consumer.listener.MyKafkaListenerAck.onMessage1(org.apache.kafka.clients.consumer.ConsumerRecord<java.lang.String, java.lang.String>,org.springframework.kafka.support.Acknowledgment)' threw exception
=================
my_group1消费者获取分区0的消息:topic = my_topic1,partition:0,offset = 2,key = ,value = 指定ack-mode: manual_immediate消费6
出现异常,消息内容:value = ConsumerRecord(topic = my_topic1, partition = 0, leaderEpoch = 0, offset = 2, CreateTime = 1717672170855, serialized key size = 0, serialized value size = 39, headers = RecordHeaders(headers = [], isReadOnly = false), key = , value = 指定ack-mode: manual_immediate消费6)
header = {id=68082673-07d2-6f69-3935-c7034a7caf81, timestamp=1717672488753}
异常信息:Listener method 'public void com.atguigu.spring.kafka.consumer.listener.MyKafkaListenerAck.onMessage1(org.apache.kafka.clients.consumer.ConsumerRecord<java.lang.String, java.lang.String>,org.springframework.kafka.support.Acknowledgment)' threw exception
=================
my_group1消费者获取分区0的消息:topic = my_topic1,partition:0,offset = 3,key = ,value = 指定ack-mode: manual_immediate消费9
出现异常,消息内容:value = ConsumerRecord(topic = my_topic1, partition = 0, leaderEpoch = 0, offset = 3, CreateTime = 1717672170855, serialized key size = 0, serialized value size = 39, headers = RecordHeaders(headers = [], isReadOnly = false), key = , value = 指定ack-mode: manual_immediate消费9)
header = {id=bcbda053-9536-df91-d937-2688b5d4c6ea, timestamp=1717672488754}
异常信息:Listener method 'public void com.atguigu.spring.kafka.consumer.listener.MyKafkaListenerAck.onMessage1(org.apache.kafka.clients.consumer.ConsumerRecord<java.lang.String, java.lang.String>,org.springframework.kafka.support.Acknowledgment)' threw exception
=================
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v3.0.5)
my_group1消费者获取分区0的消息:topic = my_topic1,partition:0,offset = 0,key = ,value = 指定ack-mode: manual_immediate消费0
出现异常,消息内容:value = ConsumerRecord(topic = my_topic1, partition = 0, leaderEpoch = 0, offset = 0, CreateTime = 1717672170845, serialized key size = 0, serialized value size = 39, headers = RecordHeaders(headers = [], isReadOnly = false), key = , value = 指定ack-mode: manual_immediate消费0)
header = {id=6bc9edb9-ad1c-e00e-9b27-c0c540248091, timestamp=1717672854508}
异常信息:Listener method 'public void com.atguigu.spring.kafka.consumer.listener.MyKafkaListenerAck.onMessage1(org.apache.kafka.clients.consumer.ConsumerRecord<java.lang.String, java.lang.String>,org.springframework.kafka.support.Acknowledgment)' threw exception
=================
my_group1消费者获取分区0的消息:topic = my_topic1,partition:0,offset = 1,key = ,value = 指定ack-mode: manual_immediate消费3
出现异常,消息内容:value = ConsumerRecord(topic = my_topic1, partition = 0, leaderEpoch = 0, offset = 1, CreateTime = 1717672170855, serialized key size = 0, serialized value size = 39, headers = RecordHeaders(headers = [], isReadOnly = false), key = , value = 指定ack-mode: manual_immediate消费3)
header = {id=14e6951b-b25f-10ca-702c-a1699d25645b, timestamp=1717672854508}
异常信息:Listener method 'public void com.atguigu.spring.kafka.consumer.listener.MyKafkaListenerAck.onMessage1(org.apache.kafka.clients.consumer.ConsumerRecord<java.lang.String, java.lang.String>,org.springframework.kafka.support.Acknowledgment)' threw exception
=================
my_group1消费者获取分区0的消息:topic = my_topic1,partition:0,offset = 2,key = ,value = 指定ack-mode: manual_immediate消费6
出现异常,消息内容:value = ConsumerRecord(topic = my_topic1, partition = 0, leaderEpoch = 0, offset = 2, CreateTime = 1717672170855, serialized key size = 0, serialized value size = 39, headers = RecordHeaders(headers = [], isReadOnly = false), key = , value = 指定ack-mode: manual_immediate消费6)
header = {id=26e85ef8-2502-fd29-8d5b-091ec0362900, timestamp=1717672854509}
异常信息:Listener method 'public void com.atguigu.spring.kafka.consumer.listener.MyKafkaListenerAck.onMessage1(org.apache.kafka.clients.consumer.ConsumerRecord<java.lang.String, java.lang.String>,org.springframework.kafka.support.Acknowledgment)' threw exception
=================
my_group1消费者获取分区0的消息:topic = my_topic1,partition:0,offset = 3,key = ,value = 指定ack-mode: manual_immediate消费9
出现异常,消息内容:value = ConsumerRecord(topic = my_topic1, partition = 0, leaderEpoch = 0, offset = 3, CreateTime = 1717672170855, serialized key size = 0, serialized value size = 39, headers = RecordHeaders(headers = [], isReadOnly = false), key = , value = 指定ack-mode: manual_immediate消费9)
header = {id=25c6b6c8-d02d-2091-7c6f-ebaea6c52d1d, timestamp=1717672854509}
异常信息:Listener method 'public void com.atguigu.spring.kafka.consumer.listener.MyKafkaListenerAck.onMessage1(org.apache.kafka.clients.consumer.ConsumerRecord<java.lang.String, java.lang.String>,org.springframework.kafka.support.Acknowledgment)' threw exception
=================
此时如果不关闭SpringKafkaConsumerApplication,生产者继续发送消息,消费者只会往后消费,不会从头再次消费
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