sunqing created KAFKA-8497:
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Summary: kafka streams application占用内存很高
Key: KAFKA-8497
URL: https://issues.apache.org/jira/browse/KAFKA-8497
Project: Kafka
Issue Type: Bug
Components: streams
Affects Versions: 1.0.0
Reporter: sunqing
一个简单的kafka streams测试应用，使用KStream来消费数据，当所消费的kafka
Topic中的数据暴涨时，或者要消费的Topic中待消费数据量很大时，消费程序占用的内存会非常高，能达到20多G，
疑问：kafka streams不是逐条消费吗，为啥topic中的数据量很大时会导致程序内存飙升
测试程序代码如下：
代码如下：
public class RunMain {
public static StreamsBuilder builder = new StreamsBuilder();
public static void kafkaStreamStart() {
KStream<String, String> stream =
builder.stream(Arrays.asList("wk_wangxin_po"));
Properties props = new Properties();
props.put(StreamsConfig.APPLICATION_ID_CONFIG, "testwang_xin");
props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG,
"zktj-kafka-broker-out-1:29092,zktj-kafka-broker-out-2:29092,zktj-kafka-broker-out-3:29092");
props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG,
Serdes.String().getClass());
props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG,
Serdes.String().getClass());
props.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, 3000);
props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
props.put(StreamsConfig.NUM_STREAM_THREADS_CONFIG, 1);
props.setProperty("security.protocol", "SASL_PLAINTEXT");
props.setProperty("sasl.mechanism", "PLAIN");
props.setProperty("sasl.kerberos.service.name", "kafka");
System.setProperty("java.security.auth.login.config",
"./conf/kafka_client_jaas.conf");
stream.foreach(new ForeachAction<String, String>() {
@Override
public void apply(String key, String value) {
System.out.println("====");
System.out.println(key);
}
});
Topology topo = builder.build();
KafkaStreams streams = new KafkaStreams(topo, props);
streams.start();
}
public static void main(String[] args) {
kafkaStreamStart();
}
}
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