使用kafka-clients操作kafka始终不成功，原因不清楚，下面贴出相关代码及配置，请懂得指点一下，谢谢!
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>0.10.2.0</version>
</dependency>JDK版本为1.8、Kafka版本为2.12-0.10.2.0，服务器使用CentOS-7构建。
TestBase.java
public class TestBase {
protected Logger log = LoggerFactory.getLogger(this.getClass());
protected String kafka_server = "192.168.60.160:9092" ;
protected String topic = "zlikun_topic";
}ProducerTest.java
public class ProducerTest extends TestBase {
protected Properties props = new Properties();
@Before
public void init() {
props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, kafka_server);
props.put(ProducerConfig.ACKS_CONFIG, "all");
props.put(ProducerConfig.RETRIES_CONFIG, 0);
props.put(ProducerConfig.BATCH_SIZE_CONFIG, 16384);
props.put(ProducerConfig.LINGER_MS_CONFIG, 1);
props.put(ProducerConfig.BUFFER_MEMORY_CONFIG, 33554432);
props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
props.put(ProducerConfig.PARTITIONER_CLASS_CONFIG ,MyPartitioner.class) ;
}
@Test
public void test() throws InterruptedException {
KafkaProducer<String, String> producer = new KafkaProducer<>(props);
// 发送消息
for (int i = 0; i < 10; i++) {
producer.send(new ProducerRecord<String, String>(topic, Integer.toString(i), Integer.toString(i)), new Callback() {
@Override
public void onCompletion(RecordMetadata recordMetadata, Exception e) {
if (e == null) {
System.out.printf("offset = %d ,partition = %d \n", recordMetadata.offset() ,recordMetadata.partition());
} else {
log.error("send error !" ,e);
}
}
});
}
TimeUnit.SECONDS.sleep(3);
producer.close();
}
}ConsumerTest.java
public class ConsumerTest extends TestBase {
private Properties props = new Properties();
@Before
public void init() {
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, kafka_server);
props.put(ConsumerConfig.GROUP_ID_CONFIG ,"zlikun") ;
props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, "true");
props.put(ConsumerConfig.AUTO_COMMIT_INTERVAL_MS_CONFIG, "1000");
props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
}
@Test
public void test() {
Consumer<String, String> consumer = new KafkaConsumer<>(props);
consumer.subscribe(Arrays.asList(topic));
// consumer.assign(Arrays.asList(new TopicPartition(topic, 1)));
while (true) {
ConsumerRecords<String, String> records = consumer.poll(100);
for (ConsumerRecord<String, String> record : records) {
System.out.printf("offset = %d, key = %s, value = %s%n", record.offset(), record.key(), record.value());
}
}
}
}# 测试topic为手动创建
$ bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 4 --topic zlikun_topic控制台输出信息
[kafka-producer-network-thread | producer-1] ERROR com.zlikun.mq.ProducerTest - send error !
org.apache.kafka.common.errors.TimeoutException: Expiring 2 record(s) for zlikun_topic-3: 30042 ms has passed since batch creation plus linger time
[kafka-producer-network-thread | producer-1] ERROR com.zlikun.mq.ProducerTest - send error !
org.apache.kafka.common.errors.TimeoutException: Expiring 2 record(s) for zlikun_topic-3: 30042 ms has passed since batch creation plus linger time
[kafka-producer-network-thread | producer-1] ERROR com.zlikun.mq.ProducerTest - send error !
org.apache.kafka.common.errors.TimeoutException: Expiring 2 record(s) for zlikun_topic-2: 30042 ms has passed since batch creation plus linger time
[kafka-producer-network-thread | producer-1] ERROR com.zlikun.mq.ProducerTest - send error !
org.apache.kafka.common.errors.TimeoutException: Expiring 2 record(s) for zlikun_topic-2: 30042 ms has passed since batch creation plus linger time
[kafka-producer-network-thread | producer-1] ERROR com.zlikun.mq.ProducerTest - send error !
org.apache.kafka.common.errors.TimeoutException: Expiring 3 record(s) for zlikun_topic-1: 30043 ms has passed since batch creation plus linger time
[kafka-producer-network-thread | producer-1] ERROR com.zlikun.mq.ProducerTest - send error !
org.apache.kafka.common.errors.TimeoutException: Expiring 3 record(s) for zlikun_topic-1: 30043 ms has passed since batch creation plus linger time
[kafka-producer-network-thread | producer-1] ERROR com.zlikun.mq.ProducerTest - send error !
org.apache.kafka.common.errors.TimeoutException: Expiring 3 record(s) for zlikun_topic-1: 30043 ms has passed since batch creation plus linger time
[kafka-producer-network-thread | producer-1] ERROR com.zlikun.mq.ProducerTest - send error !
org.apache.kafka.common.errors.TimeoutException: Expiring 3 record(s) for zlikun_topic-0: 30046 ms has passed since batch creation plus linger time
[kafka-producer-network-thread | producer-1] ERROR com.zlikun.mq.ProducerTest - send error !
org.apache.kafka.common.errors.TimeoutException: Expiring 3 record(s) for zlikun_topic-0: 30046 ms has passed since batch creation plus linger time
[kafka-producer-network-thread | producer-1] ERROR com.zlikun.mq.ProducerTest - send error !
org.apache.kafka.common.errors.TimeoutException: Expiring 3 record(s) for zlikun_topic-0: 30046 ms has passed since batch creation plus linger time
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Telah mengujinya, ia berfungsi dengan baik https://github.com/MOBX/kafka...
Adalah disyorkan untuk menyemak sama ada sambungan gugusan kafka adalah normal.
Saya melaraskan log ke tahap
DEBUGdan memerhatikan log dan mendapati ia disebabkan oleh ketidakupayaan untuk menghuraikan nama hos dengan betul.Saya menjumpai catatan blog dalam talian http://blog.sina.com.cn/s/blo... yang turut menyokong ini, saya turut mengkonfigurasi nama hos dalam fail
hostsdan ujian adalah normal. .Namun, nampaknya tidak munasabah untuk melakukan ini dalam aplikasi sebenar, ia akan menjejaskan operasi dan penyelenggaraan terlalu banyak.
[2017/04/11 16:16]
Saya baru jumpa artikel http://www.tuicool.com/articl... yang menyelesaikan masalah ini!