我们的项目有scala和python代码，我们需要向kafka发送/使用avro编码的消息。
我正在使用python和scala向kafka发送avro编码消息。我有scala代码中的producer，它使用twitter双射库发送avro编码的消息，如下所示：

val resourcesPath = getClass.getResource("/avro/url_info_schema.avsc")
val schemaFile = scala.io.Source.fromURL(resourcesPath).mkString
val schema = parser.parse(schemaFile)
val recordInjection = GenericAvroCodecs[GenericRecord](schema)
val avroRecord = new GenericData.Record(schema)
avroRecord.put("url_sha256", row._1)
avroRecord.put("url", row._2._1)
avroRecord.put("timestamp", row._2._2)
val recordBytes = recordInjection.apply(avroRecord)
kafkaProducer.value.send("topic", recordBytes)

avro架构看起来像

{
  "namespace": "com.rm.avro",
  "type": "record",
  "name": "url_info",
  "fields":[
     {
        "name": "url_sha256", "type": "string"
     },
     {
        "name": "url",  "type": "string"
     },
     {
        "name": "timestamp", "type": ["long"]
     }
 ]

}
我能够在斯卡拉的《Kafka康苏美尔》中成功地解码它

val resourcesPath = getClass.getResource("/avro/url_info_schema.avsc")
val schemaFile = scala.io.Source.fromURL(resourcesPath).mkString

kafkaInputStream.foreachRDD(kafkaRDD => {
  kafkaRDD.foreach(

    avroRecord => {
      val parser = new Schema.Parser()
      val schema = parser.parse(schemaFile)
      val recordInjection = GenericAvroCodecs[GenericRecord](schema)
      val record = recordInjection.invert(avroRecord.value()).get
      println(record)
    }
  )

}

但是，我无法在python中解码消息，我得到以下异常

'utf8' codec can't decode byte 0xe4 in position 16: invalid continuation byte

python代码如下所示：schema\u path=“avro/url\u info\u schema.avsc”schema=avro.schema.parse（open（schema\u path.read（））

for msg in consumer:
   bytes_reader = io.BytesIO(msg.value)
    decoder = avro.io.BinaryDecoder(bytes_reader)
    reader = avro.io.DatumReader(schema)
    decoded_msg = reader.read(decoder)
    print(decoded_msg)

另外，scala avro使用者不理解python avro生产者消息。我有个例外。python avro producer如下所示：

datum_writer = DatumWriter(schema)
bytes_writer = io.BytesIO()

datum_writer = avro.io.DatumWriter(schema)
encoder = avro.io.BinaryEncoder(bytes_writer)
datum_writer.write(data, encoder) 
raw_bytes = bytes_writer.getvalue()
producer.send(topic, raw_bytes)

如何在python和scala之间保持一致？任何指点都很好