Я пытаюсь запустить очень простой пример.У меня есть Кафка readStream, которая читает из темы Кафки.Я использую spark 2.4.0 и Kafka 0.10.2
var streamingInputDF =
spark.readStream
.format("kafka")
.option("kafka.bootstrap.servers", "localhost:9092")
.option("subscribe", "twitter-topic")
.load()
Консоль writeStream:
val activityQuery = streamingInputDF.writeStream
.format("console")
.outputMode("append")
.start()
activityQuery.awaitTermination()
Однако, когда я запускаю консоль writeStream, я получаю следующее исключение
org.apache.spark.sql.streaming.StreamingQueryException: Query [id = d21cd9b4-7f51-4f5f-acbf-943dfaaeb7e5, runId = c2b2c58d-7afe-4ca5-bc36-6a3f496c19b3] terminated with exception: Error reading field 'topic_metadata': Error reading array of size 881783, only 41 bytes available
at org.apache.spark.sql.execution.streaming.StreamExecution.org$apache$spark$sql$execution$streaming$StreamExecution$$runStream(StreamExecution.scala:295)
at org.apache.spark.sql.execution.streaming.StreamExecution$$anon$1.run(StreamExecution.scala:189)
Caused by: org.apache.kafka.common.protocol.types.SchemaException: Error reading field 'topic_metadata': Error reading array of size 881783, only 41 bytes available
at org.apache.kafka.common.protocol.types.Schema.read(Schema.java:73)
at org.apache.kafka.clients.NetworkClient.parseResponse(NetworkClient.java:380)
at org.apache.kafka.clients.NetworkClient.handleCompletedReceives(NetworkClient.java:449)
at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:269)
at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.clientPoll(ConsumerNetworkClient.java:360)