文章目录
1、消费异常处理
1.1、application.yml配置
server:port:8120# v1spring:Kafka:bootstrap-servers: 192.168.74.148:9095,192.168.74.148:9096,192.168.74.148:9097consumer:# 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 | nonekey-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
1.2、注册异常处理器
packagecom.atguigu.spring.kafka.consumer.config;importorg.apache.kafka.clients.admin.NewTopic;importorg.apache.kafka.clients.consumer.Consumer;importorg.springframework.context.annotation.Bean;importorg.springframework.context.annotation.Configuration;importorg.springframework.kafka.config.TopicBuilder;importorg.springframework.kafka.listener.ConsumerAwareListenerErrorHandler;importorg.springframework.kafka.listener.ListenerExecutionFailedException;importorg.springframework.messaging.Message;@ConfigurationpublicclassMyKafkaConfig{@BeanpublicNewTopicspringTestPartitionTopic(){returnTopicBuilder.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@BeanpublicConsumerAwareListenerErrorHandlermyErrorHandler(){//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returnnewConsumerAwareListenerErrorHandler(){@OverridepublicObjecthandleError(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("=================");returnnull;}};}}
1.3、消费者使用异常处理器
packagecom.atguigu.spring.kafka.consumer.listener;importorg.apache.kafka.clients.consumer.ConsumerRecord;importorg.springframework.kafka.annotation.KafkaListener;importorg.springframework.kafka.annotation.TopicPartition;importorg.springframework.kafka.support.Acknowledgment;importorg.springframework.stereotype.Component;@ComponentpublicclassMyKafkaListenerAck{/**
* 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")publicvoidonMessage1(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();}}
1.4、创建生产者发送消息
packagecom.atguigu.spring.kafka.consumer;importjakarta.annotation.Resource;importorg.junit.jupiter.api.Test;importorg.springframework.boot.test.context.SpringBootTest;importorg.springframework.kafka.core.KafkaTemplate;@SpringBootTestclassSpringKafkaConsumerApplicationTests{@ResourceKafkaTemplate kafkaTemplate;@TestvoidcontextLoads(){for(int i =0; i <10; i++){
kafkaTemplate.send("my_topic1",i%3,"","指定ack-mode: manual_immediate消费"+i);}}}
1.5、创建SpringBoot启动类
packagecom.atguigu.spring.kafka.consumer;importorg.springframework.boot.SpringApplication;importorg.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@SpringBootApplicationpublicclassSpringKafkaConsumerApplication{publicstaticvoidmain(String[] args){SpringApplication.run(SpringKafkaConsumerApplication.class, args);}}
1.6、屏蔽 kafka debug 日志 logback.xml
<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 --><loggername="org.apache.kafka.clients"level="debug"/></configuration>
1.7、引入spring-kafka依赖
<?xml version="1.0" encoding="UTF-8"?><projectxmlns="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>
1.8、消费者控制台：
1.8.1、第一次启动SpringKafkaConsumerApplication
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ |'_| | '_ \/ _` |\\\\\\/ ___)||_)|||||||(_||))))' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: 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
=================
1.8.n、第n次启动SpringKafkaConsumerApplication
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ |'_| | '_ \/ _` |\\\\\\/ ___)||_)|||||||(_||))))' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: 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**
本文转载自: https://blog.csdn.net/m0_65152767/article/details/139508038
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版权归原作者 小丁学Java 所有， 如有侵权，请联系我们删除。