我正在使用具有嵌套案例类的案例类，Seq[Nested Case Classes]
问题是当我尝试使用它进行序列化时，KafkaAvroSerializer它会抛出：
Caused by: java.lang.IllegalArgumentException: Unsupported Avro type. Supported types are null, Boolean, Integer, Long, Float, Double, String, byte[] and IndexedRecord
at io.confluent.kafka.serializers.AbstractKafkaAvroSerDe.getSchema(AbstractKafkaAvroSerDe.java:115)
at io.confluent.kafka.serializers.AbstractKafkaAvroSerializer.serializeImpl(AbstractKafkaAvroSerializer.java:71)
at io.confluent.kafka.serializers.KafkaAvroSerializer.serialize(KafkaAvroSerializer.java:54)
at org.apache.kafka.common.serialization.Serializer.serialize(Serializer.java:60)
at org.apache.kafka.clients.producer.KafkaProducer.doSend(KafkaProducer.java:879)
at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:841)
at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:728)```