反序列化 Jaeger 跨越 Java

Question

我正在尝试从 Java 中的 Kafka 插件中获取 Jaeger 跨度详细信息。 我正在使用以下代码：

String bootstrapServers="127.0.0.1:9092";
    String grp_id="tracing_app";
    String topic="jaeger-spans";
    //Creating consumer properties
    Properties properties=new Properties();
    properties.setProperty(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,bootstrapServers);
    properties.setProperty(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,   StringDeserializer .class.getName());
    properties.setProperty(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());
    properties.setProperty(ConsumerConfig.GROUP_ID_CONFIG,grp_id);
    properties.setProperty(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG,"earliest");
    //creating consumer
    org.apache.kafka.clients.consumer.KafkaConsumer<String,String> consumer= new org.apache.kafka.clients.consumer.KafkaConsumer<String,String>(properties);
    //Subscribing
    consumer.subscribe(Arrays.asList(topic));
    //polling
    while(true) {
        ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(100));
        for (ConsumerRecord<String, String> record : records) {
            System.out.println("Key: " + record.key() + ", Value:" + record.value());
            System.out.println("Partition:" + record.partition() + ",Offset:" + record.offset());
        }
    }

但由于某种原因，我得到了这样的 output 。

https://i.stack.imgur.com/mInTP.png

如何正确反序列化跨度数据？