问题描述
报错如下：
....
....
Caused by: org.apache.kafka.common.errors.TimeoutException: Expiring 1 record(s) for art-0:120001 ms has passed since batch creation
原因分析
这种情况，肯定要先看网络问题嘛
- 首先查看本机防火墙的配置
结果都是关闭的 （建议开放特定端口）
[root@localhost bin]# systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man:firewalld(1)
[root@localhost bin]#
不关闭防火墙，但是建议本机防火墙开放特定端口，可以使用如下命令 （使用root账户）
firewall-cmd --zone=public --add-port=2181/tcp --permanent
firewall-cmd --zone=public --add-port=9092/tcp --permanent
firewall-cmd --reload
firewall-cmd --list-ports
比如
[root@localhost bin]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: active (running) since Thu 2023-10-26 10:13:10 CST; 2min 36s ago
Docs: man:firewalld(1)
Main PID: 40311 (firewalld)
Tasks: 2
Memory: 28.1M
CGroup: /system.slice/firewalld.service
└─40311 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopid
Oct 26 10:13:10 localhost.localdomain systemd[1]: Starting firewalld - dynamic firewall daemon...
Oct 26 10:13:10 localhost.localdomain systemd[1]: Started firewalld - dynamic firewall daemon.
Oct 26 10:13:10 localhost.localdomain firewalld[40311]: WARNING: AllowZoneDrifting is enabled. This is considered an insecure configurati...it now.
Hint: Some lines were ellipsized, use -l to show in full.
[root@localhost bin]#
[root@localhost bin]#
[root@localhost bin]# firewall-cmd --zone=public --add-port=2181/tcp --permanent
success
[root@localhost bin]# firewall-cmd --zone=public --add-port=9092/tcp --permanent
success
[root@localhost bin]#
[root@localhost bin]# firewall-cmd --list-ports
[root@localhost bin]#
[root@localhost bin]# firewall-cmd --reload
success
[root@localhost bin]# firewall-cmd --list-ports
2181/tcp 9092/tcp
[root@localhost bin]#
- 接着看看kafka中间件的配置， 问题就在这里
我并没有大改配置，具体的配置可参考 Kafak - 单机/集群快速安装指北(3.x版本)
如下的配置并没有修改
要解决这个问题，修改如上配置即可
Code
package com.artisan.pc;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.clients.producer.RecordMetadata;
import org.apache.kafka.common.serialization.StringSerializer;
import java.util.Properties;
import java.util.concurrent.ExecutionException;
/**
* @author 小工匠
* @version 1.0
* @mark: show me the code , change the world
*/
public class CustomProducer {
public static void main(String[] args) throws ExecutionException, InterruptedException {
// 1. 创建kafka生产者的配置对象
Properties properties = new Properties();
// 2. 给kafka配置对象添加配置信息
properties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "192.168.126.170:9092");
// key,value序列化
properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
// 3. 创建kafka生产者对象
KafkaProducer<String, String> kafkaProducer = new KafkaProducer<String, String>(properties);
// 4. 调用send方法,发送消息
for (int i = 0; i < 10; i++) {
// 同步阻塞
RecordMetadata art = kafkaProducer.send(new ProducerRecord<>("art", "kafka-msg-" + i)).get();
System.out.println(art.topic());
System.out.println("over - " +i);
}
// 5. 关闭资源
kafkaProducer.close();
}
}
可以看消费者的控制台程序，输出正常文章来源：https://www.toymoban.com/news/detail-757540.html
文章来源地址https://www.toymoban.com/news/detail-757540.html
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