Kafka新旧版本命令问题
Kafka新旧版本命令问题1、异常汇总2、问题分析3、问题解决4、使用java生产数据4、总结1、异常汇总输入如下命令生成一个生产者/usr/local/chen/kafka/bin/kafka-console-producer.sh --broker-list 192.168.43.175:2181,192.168.43.176:2181,192.168.43.177:2181 --topi..
Kafka新旧版本命令问题
1、异常汇总
输入如下命令生成一个生产者/usr/local/chen/kafka/bin/kafka-console-producer.sh --broker-list 192.168.43.175:2181,192.168.43.176:2181,192.168.43.177:2181 --topic chentest7
。出现以下异常。
>[2020-04-12 15:27:51,725] WARN [Producer clientId=console-producer] Bootstrap broker 192.168.43.175:2181 (id: -1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
[2020-04-12 15:27:51,830] WARN [Producer clientId=console-producer] Bootstrap broker 192.168.43.177:2181 (id: -3 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
[2020-04-12 15:27:51,932] WARN [Producer clientId=console-producer] Bootstrap broker 192.168.43.177:2181 (id: -3 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
[2020-04-12 15:27:52,036] WARN [Producer clientId=console-producer] Bootstrap broker 192.168.43.175:2181 (id: -1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
[2020-04-12 15:27:52,143] WARN [Producer clientId=console-producer] Bootstrap broker 192.168.43.176:2181 (id: -2 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
[2020-04-12 15:27:52,245] WARN [Producer clientId=console-producer] Bootstrap broker 192.168.43.176:2181 (id: -2 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
2、问题分析
这是由于新旧版本kafka
命令不同。
3、问题解决
使用新版本的kafka
启动命令即可。/usr/local/chen/kafka/bin/kafka-console-producer.sh --broker-list 192.168.43.175:9092,192.168.43.176:9092,192.168.43.177:9092 --topic chentest6
用来启动生产者。输入信息即可被消费者监听到。
然后使用/usr/local/chen/kafka/bin/kafka-console-consumer.sh --bootstrap-server 192.168.43.175:9092,192.168.43.176:9092,192.168.43.177:9092 --topic chentest6 --from-beginning
命令生成消费者。我们发现消费者已经成功的消费到信息。
4、使用java生产数据
简单的定义一个类,配置kafka
的相关信息,用来生成数据。
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;
import java.util.Properties;
/**
* @author Chen
* @version 1.0
* @date 2020/4/10 8:03
* @description:
*/
public class ProducerDemo {
private final KafkaProducer<String, String> producer;
// public final static String TOPIC = "access-log";
public final static String TOPIC = "chentest6";
private ProducerDemo() {
Properties props = new Properties();
props.put("zookeeper.connect", "192.168.43.175:2181,192.168.43.176:2181,192.168.43.177:2181");
props.put("acks", "all");//所有follower都响应了才认为消息提交成功,即"committed"
props.put("retries", 0);//retries = MAX 无限重试,直到你意识到出现了问题:)
props.put("batch.size", 16384);//producer将试图批处理消息记录,以减少请求次数.默认的批量处理消息字节数
//batch.size当批量的数据大小达到设定值后,就会立即发送,不顾下面的linger.ms
props.put("linger.ms", 1);//延迟1ms发送,这项设置将通过增加小的延迟来完成--即,不是立即发送一条记录,producer将会等待给定的延迟时间以允许其他消息记录发送,这些消息记录可以批量处理
props.put("buffer.memory", 33554432);//producer可以用来缓存数据的内存大小。
props.put("key.serializer",
"org.apache.kafka.common.serialization.IntegerSerializer");
props.put("value.serializer",
"org.apache.kafka.common.serialization.StringSerializer");
producer = new KafkaProducer<String, String>(props);
}
public void produce() {
int messageNo = 1;
final int COUNT = 5;
while (messageNo < COUNT) {
String key = String.valueOf(messageNo);
String data = String.format("hello KafkaProducer message %s from hubo chen ", key);
try {
producer.send(new ProducerRecord<String, String>(TOPIC, data));
} catch (Exception e) {
e.printStackTrace();
}
messageNo++;
}
producer.close();
}
public static void main(String[] args) {
ProducerDemo producerDemo = new ProducerDemo();
producerDemo.produce();
}
}
运行后不出意外出现了异常。
Exception in thread "main" org.apache.kafka.common.config.ConfigException: Missing required configuration "bootstrap.servers" which has no default value.
at org.apache.kafka.common.config.ConfigDef.parseValue(ConfigDef.java:463)
at org.apache.kafka.common.config.ConfigDef.parse(ConfigDef.java:453)
at org.apache.kafka.common.config.AbstractConfig.<init>(AbstractConfig.java:62)
at org.apache.kafka.common.config.AbstractConfig.<init>(AbstractConfig.java:75)
at org.apache.kafka.clients.producer.ProducerConfig.<init>(ProducerConfig.java:359)
at org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:287)
at ProducerDemo.<init>(ProducerDemo.java:35)
at ProducerDemo.main(ProducerDemo.java:59)
同样是版本问题,在新版本中,使用props.put("bootstrap.servers", "192.168.43.175:9092,192.168.43.176:9092,192.168.43.177:9092");
配置服务器。修改代码如下:
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;
import java.util.Properties;
/**
* @author Chen
* @version 1.0
* @date 2020/4/10 8:03
* @description:
*/
public class ProducerDemo {
private final KafkaProducer<String, String> producer;
// public final static String TOPIC = "access-log";
public final static String TOPIC = "chentest6";
private ProducerDemo() {
Properties props = new Properties();
props.put("bootstrap.servers", "192.168.43.175:9092,192.168.43.176:9092,192.168.43.177:9092");//xxx服务器ip
// props.put("bootstrap.servers", "192.168.43.120:9092");//xxx服务器ip
// props.put("bootstrap.servers", "192.168.43.175:9092");//xxx服务器ip
props.put("acks", "all");//所有follower都响应了才认为消息提交成功,即"committed"
props.put("retries", 0);//retries = MAX 无限重试,直到你意识到出现了问题:)
props.put("batch.size", 16384);//producer将试图批处理消息记录,以减少请求次数.默认的批量处理消息字节数
//batch.size当批量的数据大小达到设定值后,就会立即发送,不顾下面的linger.ms
props.put("linger.ms", 1);//延迟1ms发送,这项设置将通过增加小的延迟来完成--即,不是立即发送一条记录,producer将会等待给定的延迟时间以允许其他消息记录发送,这些消息记录可以批量处理
props.put("buffer.memory", 33554432);//producer可以用来缓存数据的内存大小。
props.put("key.serializer",
"org.apache.kafka.common.serialization.IntegerSerializer");
props.put("value.serializer",
"org.apache.kafka.common.serialization.StringSerializer");
producer = new KafkaProducer<String, String>(props);
}
public void produce() {
int messageNo = 1;
final int COUNT = 5;
while (messageNo < COUNT) {
String key = String.valueOf(messageNo);
String data = String.format("hello KafkaProducer message %s from hubo chen ", key);
try {
producer.send(new ProducerRecord<String, String>(TOPIC, data));
} catch (Exception e) {
e.printStackTrace();
}
messageNo++;
}
producer.close();
}
public static void main(String[] args) {
ProducerDemo producerDemo = new ProducerDemo();
producerDemo.produce();
}
}
直接运行,查看服务器消费者信息。
可以成功消费到数据。
4、总结
软件的更新修改了BUG,或许也添加了新的功能,但是对使用者来说有点不太友好,要是自动检测到某个命令是旧命令,然后提示用户输入一个新的命令,是不是想想都激动。算了当前幻想,好好看官方文档吧!
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