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https://issues.apache.org/jira/browse/KAFKA-5766?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16149087#comment-16149087
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Sebastian Bernauer commented on KAFKA-5766:
-------------------------------------------
Still the same problem
Kafka version 0.11.0.0 (for Scala 2.11; recommended)
my dependency:
{noformat}
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
<version>1.2.2.RELEASE</version>
</dependency>
{noformat}
My complete code:
{code:java}
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.serialization.StringDeserializer;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
public class Main {
public static void main(String[] args) {
Map<String, Object> configs = new HashMap<>();
configs.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
configs.put(ConsumerConfig.GROUP_ID_CONFIG, "gh399");
configs.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,
StringDeserializer.class);
configs.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,
StringDeserializer.class);
configs.put(ConsumerConfig.RETRY_BACKOFF_MS_CONFIG, 500);
configs.put(ConsumerConfig.RECONNECT_BACKOFF_MS_CONFIG, 500);
KafkaConsumer<String, String> consumer = new KafkaConsumer<>(configs);
consumer.assign(Collections.singletonList(new TopicPartition("foo",
0)));
while (true) {
ConsumerRecords<String, String> records = consumer.poll(1000);
System.out.println(records.count());
}
}
}
{code}
> Very high CPU-load of consumer when broker is down
> --------------------------------------------------
>
> Key: KAFKA-5766
> URL: https://issues.apache.org/jira/browse/KAFKA-5766
> Project: Kafka
> Issue Type: Bug
> Components: consumer
> Reporter: Sebastian Bernauer
>
> Hi,
> i have a single broker instance at localhost.
> I set up a Consumer with the following code:
> {code:java}
> Map<String, Object> configs = new HashMap<>();
> configs.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,
> "localhost:9092");
> configs.put(ConsumerConfig.GROUP_ID_CONFIG, "gh399");
> configs.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,
> StringDeserializer.class);
> configs.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,
> StringDeserializer.class);
> KafkaConsumer<String, String> consumer = new KafkaConsumer<>(configs);
> consumer.assign(Collections.singletonList(new TopicPartition("foo",
> 0)));
> while (true) {
> ConsumerRecords<String, String> records = consumer.poll(1000);
> System.out.println(records.count());
> }
> {code}
> This works all fine, until i shut down the broker.
> If i do so, it causes a 100% CPU-load of my application.
> After starting the broker again the usage decreases back to a normal level.
> It would be very nice if you could help me!
> Thanks,
> Sebastian
> Spring-Kafka: 2.0.0.M3
> Kafka: 0.10.2.0
> JDK: 1.8.0_121
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