java - Kafka生产者无法向服务器发送数据

Question

这是我的代码。我能够创建主题，但由于某种原因无法在主题内发送数据。很长一段时间后我收到这些错误。我正在使用kafka版本2.11-0.8.2.1

org.apache.kafka.clients.producer.KafkaProducer$FutureFailure@5474c6c
org.apache.kafka.clients.producer.KafkaProducer$FutureFailure@4b6995df

这是kafka的server.log文件

[2016-12-27 21:05:54,873] ERROR Closing socket for /127.0.0.1 because of error (kafka.network.Processor)
java.io.IOException: An established connection was aborted by the software in your host machine
at sun.nio.ch.SocketDispatcher.read0(Native Method)
at sun.nio.ch.SocketDispatcher.read(Unknown Source)
at sun.nio.ch.IOUtil.readIntoNativeBuffer(Unknown Source)
at sun.nio.ch.IOUtil.read(Unknown Source)
at sun.nio.ch.SocketChannelImpl.read(Unknown Source)
at kafka.utils.Utils$.read(Utils.scala:380)
at kafka.network.BoundedByteBufferReceive.readFrom(BoundedByteBufferReceive.scala:54)
at kafka.network.Processor.read(SocketServer.scala:444)
at kafka.network.Processor.run(SocketServer.scala:340)
at java.lang.Thread.run(Unknown Source)
[2016-12-27 21:07:54,727] INFO Closing socket connection to /127.0.0.1. (kafka.network.Processor)
[2016-12-27 21:16:08,559] INFO Closing socket connection to /127.0.0.1. (kafka.network.Processor)

这是我将整数发送到kafka系统的java代码:

Properties props = new Properties();
    props.put("bootstrap.servers", "localhost:9092");
    props.put("acks", "all");
    props.put("retries", 0);
    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");
    props.put("timeout.ms", "50");

    Producer<String, String> producer = new KafkaProducer<>(props);
         for(int i = 0; i < 2; i++)
             System.out.println(producer.send(new ProducerRecord<String, String>("testtopic", Integer.toString(i), 
                     Integer.toString(i))).toString());

producer.close();

这是 pom.xml

<dependencies>
     <dependency>
     <groupId>org.apache.kafka</groupId>
     <artifactId>kafka-clients</artifactId>
     <version>0.10.1.0</version>
</dependency>  
<dependency>
  <groupId>org.apache.kafka</groupId>
  <artifactId>kafka_2.11</artifactId>
  <version>0.8.2.1</version>
</dependency>  
<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-simple</artifactId>
  <version>1.6.4</version>
</dependency>
<dependency>
  <groupId>log4j</groupId>
  <artifactId>log4j</artifactId>
  <version>1.2.16</version>
  <exclusions>
    <exclusion>
      <groupId>javax.jms</groupId>
      <artifactId>jms</artifactId>
    </exclusion>
  </exclusions>
</dependency>
</dependencies>

Answer 1

没有什么特别突出的

props.put("timeout.ms", "50");

请求超时应该大于默认轮询间隔，在 Kafka 中默认轮询间隔为 5 分钟。所以我想如果将其保留为默认值(略高于 5 分钟)，它应该可以工作。