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https://issues.apache.org/jira/browse/KAFKA-5263?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16014226#comment-16014226
]
Konstantin Smirnov edited comment on KAFKA-5263 at 5/17/17 3:36 PM:
--------------------------------------------------------------------
Sample code leading to the trouble:
{code}
public static void main(String[] args) {
System.out.println("Starting consumer");
Properties props = new Properties();
props.put("bootstrap.servers", "localhost:9092");
props.put("group.id", "test12345");
props.put("reconnect.backoff.ms", "1000");
props.put("retry.backoff.ms", "1000");
props.put("session.timeout.ms", "10000");
props.put("key.deserializer",
"org.apache.kafka.common.serialization.StringDeserializer");
props.put("value.deserializer",
"org.apache.kafka.common.serialization.StringDeserializer");
try (KafkaConsumer<String, String> consumer = new
KafkaConsumer<>(props)) {
String topic = "test-topic";
// consumer.subscribe(Arrays.asList(topic));
List<TopicPartition> partitions = new ArrayList<>();
for (PartitionInfo partition : consumer.partitionsFor(topic)) {
partitions.add(new TopicPartition(topic,
partition.partition()));
}
consumer.assign(partitions);
for (;;) {
ConsumerRecords<String, String> records = consumer.poll(1000);
if (!records.isEmpty()) {
System.out.println("Records aren't empty!");
}
records.forEach(System.out::println);
}
}
}
{code}
Steps to reproduce:
* Start Kafka broker
* Run the sample code
* Stop Kafka broker
was (Author: kosm):
Sample code leading to the trouble:
{code}
public static void main(String[] args) {
System.out.println("Starting consumer");
Properties props = new Properties();
props.put("bootstrap.servers", "localhost:9092");
props.put("group.id", "test12345");
props.put("reconnect.backoff.ms", "1000");
props.put("retry.backoff.ms", "1000");
props.put("session.timeout.ms", "10000");
props.put("key.deserializer",
"org.apache.kafka.common.serialization.StringDeserializer");
props.put("value.deserializer",
"org.apache.kafka.common.serialization.StringDeserializer");
try (KafkaConsumer<String, String> consumer = new
KafkaConsumer<>(props)) {
String topic = "test-topic";
// consumer.subscribe(Arrays.asList(topic));
List<TopicPartition> partitions = new ArrayList<>();
for (PartitionInfo partition : consumer.partitionsFor(topic)) {
partitions.add(new TopicPartition(topic,
partition.partition()));
}
consumer.assign(partitions);
for (;;) {
ConsumerRecords<String, String> records = consumer.poll(1000);
if (!records.isEmpty()) {
System.out.println("Records aren't empty!");
}
records.forEach(System.out::println);
}
}
}
{code}
> kakfa-clients consume 100% CPU with manual partition assignment
> ---------------------------------------------------------------
>
> Key: KAFKA-5263
> URL: https://issues.apache.org/jira/browse/KAFKA-5263
> Project: Kafka
> Issue Type: Bug
> Components: clients
> Affects Versions: 0.10.1.0, 0.10.1.1, 0.10.2.0, 0.10.2.1
> Reporter: Konstantin Smirnov
>
> Noticed that lose of the connection to Kafka broker leads kafka-clients to
> consume 100% CPU. The bug only appears when the manual partition assignmet is
> used. It appears since the version 0.10.1.0. The bug is quite similar to
> KAFKA-1642.
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