我试图从uu consumer_uoffset主题中消费，因为这似乎是检索有关消费者的kafka度量（如消息延迟等）的最简单方法。理想的方法是从jmx访问它，但想先尝试一下，返回的消息似乎是加密的或不可读的形式。也尝试添加stringdeserializer属性。有人对如何纠正这个问题有什么建议吗？再次提到这是一个复制品
重复消费单元偏移
没有帮助，因为它没有引用我的问题，即在java中以字符串形式读取消息。也更新了代码，尝试使用kafka.client consumer创建一个consumerrecord。

consumerProps.put("exclude.internal.topics",  false);
consumerProps.put("group.id" , groupId);
consumerProps.put("zookeeper.connect", zooKeeper);

consumerProps.put("key.deserializer",
  "org.apache.kafka.common.serialization.StringDeserializer");  
consumerProps.put("value.deserializer",
  "org.apache.kafka.common.serialization.StringDeserializer");

ConsumerConfig consumerConfig = new ConsumerConfig(consumerProps);
ConsumerConnector consumer = 
kafka.consumer.Consumer.createJavaConsumerConnector(
       consumerConfig);

Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
topicCountMap.put(topic, new Integer(1));
Map<String, List<KafkaStream<byte[], byte[]>>> consumerMap = 
   consumer.createMessageStreams(topicCountMap);
List<KafkaStream<byte[], byte[]>> streams = consumerMap.get(topic);

for (KafkaStream stream : streams) {

    ConsumerIterator<byte[], byte[]> it = stream.iterator();

    //errorReporting("...CONSUMER-KAFKA CONNECTION SUCCESSFUL!");

    while (it.hasNext()) {
         try {

             String mesg = new String(it.next().message());
             System.out.println( mesg);

代码更改：

try {       
    // errorReporting("CONSUMER-KAFKA CONNECTION INITIATING...");   
    Properties consumerProps = new Properties();
    consumerProps.put("exclude.internal.topics",  false);
    consumerProps.put("group.id" , "test");
    consumerProps.put("bootstrap.servers", servers);
    consumerProps.put("key.deserializer","org.apache.kafka.common.serialization.StringDeserializer");  
    consumerProps.put("value.deserializer","org.apache.kafka.common.serialization.StringDeserializer");

    //ConsumerConfig consumerConfig = new ConsumerConfig(consumerProps);
    //ConsumerConnector consumer = kafka.consumer.Consumer.createJavaConsumerConnector(
    //       consumerConfig);

    //Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
    //topicCountMap.put(topic, new Integer(1));
    //Map<String, List<KafkaStream<byte[], byte[]>>> consumerMap = consumer.createMessageStreams(topicCountMap);
    //List<KafkaStream<byte[], byte[]>> streams = consumerMap.get(topic);

    KafkaConsumer<String, String> kconsumer = new KafkaConsumer<>(consumerProps); 
    kconsumer.subscribe(Arrays.asList(topic)); 

    try {
        while (true) {
            ConsumerRecords<String, String> records = kconsumer.poll(10);

            for (ConsumerRecord<String, String> record : records)

                System.out.println(record.offset() + ": " + record.value());
        }
    } finally {
          kconsumer.close();
    }

以及下面信息的快照；在图像底部：