I have below kafka producer Api program and i am new to kafka itself. Below code fetch data from one of API and send message to kafka topic.
package kafka_Demo;
import java.util.Properties;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.apache.kafka.clients.producer.*;
import java.net.URL;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;
public class HttpBasicAuth {
public static void main(String[] args) {
try {
Properties props = new Properties();
props.put("bootstrap.servers", "localhost:9092");
props.put("zookeeper.connect", "localhost:2181");
props.put("batch.size", 16384);
props.put("linger.ms", 1);
props.put("buffer.memory", 33554432);
props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
Producer<String, String> producer = new KafkaProducer<>(props);
Json_read count = new Json_read();
URL url = new URL("https://alm.sysbiz.org/rest/api/2/search?jql=project=ALG&maxResults=0");
long total_ticket = count.ticketCount(url);
Alm_authentication alm = new Alm_authentication();
for (long i = 0; i <=total_ticket ; i = i + 20) {
url = new URL("https://alm.sysbiz.org/rest/api/2/search?jql=project=ALG&expand=changelog&startAt=" + i+"&maxResults=20");
InputStream content = (InputStream) alm.performAuth(url);
if (content != null) {
BufferedReader in = new BufferedReader(new InputStreamReader(content));
String line;
while ((line = in.readLine()) != null) {
//writer.println(line);
// System.out.println(line);
producer.send(new ProducerRecord<String, String>("test", "a11", line)).get();
}
}
producer.send(new ProducerRecord<String, String>("test", "a11", "\n"));
content.close();
}
producer.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
While i am running above code i am getting below error at kafka broker.
ERROR Processor got uncaught exception. (kafka.network.Processor)
java.lang.ArrayIndexOutOfBoundsException: 18
at org.apache.kafka.common.protocol.ApiKeys.forId(ApiKeys.java:68)
at org.apache.kafka.common.requests.AbstractRequest.getRequest(AbstractRequest.java:39)
at kafka.network.RequestChannel$Request.<init>(RequestChannel.scala:79)
at kafka.network.Processor$$anonfun$run$11.apply(SocketServer.scala:426)
at kafka.network.Processor$$anonfun$run$11.apply(SocketServer.scala:421)
at scala.collection.Iterator$class.foreach(Iterator.scala:727)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
at kafka.network.Processor.run(SocketServer.scala:421)
at java.lang.Thread.run(Thread.java:748)
I have tried a lot by searching in Google but no luck. Can any one help me to resolve it. And below error i can see it in my eclipse IDE.
java.util.concurrent.ExecutionException: org.apache.kafka.common.errors.TimeoutException: Failed to update metadata after 60000 ms.
at org.apache.kafka.clients.producer.KafkaProducer$FutureFailure.<init>(KafkaProducer.java:1124)
at org.apache.kafka.clients.producer.KafkaProducer.doSend(KafkaProducer.java:823)
at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:760)
at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:648)
at kafka_Demo.HttpBasicAuth.main(HttpBasicAuth.java:40)
Caused by: org.apache.kafka.common.errors.TimeoutException: Failed to update metadata after 60000 ms.
This happens due to kafka version mismatch. Make sure kafka-clients jar version & kafka server version installed in your machine.
来源：https://stackoverflow.com/questions/48927177/kafka-network-processor-error-in-producer-programarrayindexoutofboundsexception