Kafka Kerberos Consumer api“无法找到Set的领导者（TOPICNAME，0）”

Question

我正在尝试使用Kerberos为Kafka配置安全性。

它通过命令提示符正常工作。

但是当我通过java代码尝试时遇到问题。

将错误视为：

无法找到Set的领导者（[test，0]，[test，1]）

显示java.lang.NullPointerException     在org.apache.kafka.common.utils.Utils.formatAddress（Utils.java:312）

这是我的代码，

     final static String clientId = "SimpleConsumerDemoClient";
     public  final static String TOPIC = "test";
     ConsumerConnector consumerConnector;

      public static void main(String[] argv) throw 
       UnsupportedEncodingException {
         System.setProperty("java.security.krb5.realm", "EXAMPLE.COM");
        System.setProperty("java.security.krb5.kdc", "FQDN");
        System.setProperty("sun.security.krb5.debug", "true");
        System.setProperty("sun.security.spnego.debug", "true");
       System.setProperty("java.security.krb5.conf","root/etc/krb5.conf");

        System.setProperty("javax.security.auth.useSubjectCredsOnly","false");
    Consumer helloKafkaConsumer = new Consumer();

    helloKafkaConsumer.start();
}

public Consumer(){
    Properties properties = new Properties();
    properties.put("zookeeper.connect","DOMAIN:2181");
    properties.put("group.id","test-group");
    properties.put("security.protocol", "PLAINTEXTSASL");
    properties.put("auto.offset.reset","smallest");
    ConsumerConfig consumerConfig = new ConsumerConfig(properties);
    consumerConnector =  kafka.consumer.Consumer.createJavaConsumerConnector(consumerConfig);
}

@Override
public void run() {
    Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
    topicCountMap.put(TOPIC, new Integer(1));
    Map<String, List<KafkaStream<byte[], byte[]>>> consumerMap = consumerConnector.createMessageStreams(topicCountMap);
    KafkaStream<byte[], byte[]> stream =  consumerMap.get(TOPIC).get(0);
    ConsumerIterator<byte[], byte[]> it = stream.iterator();
    while(it.hasNext()){
        String str = new String(it.next().message(), StandardCharsets.UTF_8);

        System.out.println(str+" The message consumed");
    }
}

private static void printMessages(ByteBufferMessageSet messageSet) throws UnsupportedEncodingException {
    for(MessageAndOffset messageAndOffset: messageSet) {
        ByteBuffer payload = messageAndOffset.message().payload();
        byte[] bytes = new byte[payload.limit()];
        payload.get(bytes);
        System.out.println(new String(bytes, "UTF-8"));
    }
}

}

感谢任何帮助。