[FLINK-24544] Failure when using Kafka connector in Table API with Avro and Confluent schema registry

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.13.1
• Component/s: Connectors / Kafka, Formats (JSON, Avro, Parquet, ORC, SequenceFile), Table SQL / Ecosystem
• Assignee: Unassigned
• Reporter: Francesco Guardiani
• Created: 14/Oct/21 09:15
• Updated: 22/Jan/24 08:50

Description

A user reported in the mailing list that Avro deserialization fails when using Kafka, Avro and Confluent Schema Registry:

Caused by: java.io.IOException: Failed to deserialize Avro record.
  at org.apache.flink.formats.avro.AvroRowDataDeserializationSchema.deserialize(AvroRowDataDeserializationSchema.java:106)
  at org.apache.flink.formats.avro.AvroRowDataDeserializationSchema.deserialize(AvroRowDataDeserializationSchema.java:46)  
  at org.apache.flink.api.common.serialization.DeserializationSchema.deserialize(DeserializationSchema.java:82)
  at org.apache.flink.streaming.connectors.kafka.table.DynamicKafkaDeserializationSchema.deserialize(DynamicKafkaDeserializationSchema.java:113)
  at org.apache.flink.streaming.connectors.kafka.internals.KafkaFetcher.partitionConsumerRecordsHandler(KafkaFetcher.java:179) 
  at org.apache.flink.streaming.connectors.kafka.internals.KafkaFetcher.runFetchLoop(KafkaFetcher.java:142)
  at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:826)
  at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:110)
  at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:66)
  at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:269)
Caused by: org.apache.avro.AvroTypeException: Found my.type.avro.MyEnumType, expecting union
  at org.apache.avro.io.ResolvingDecoder.doAction(ResolvingDecoder.java:308)
  at org.apache.avro.io.parsing.Parser.advance(Parser.java:86)
  at org.apache.avro.io.ResolvingDecoder.readIndex(ResolvingDecoder.java:275)
  at org.apache.avro.generic.GenericDatumReader.readWithoutConversion(GenericDatumReader.java:187)
  at org.apache.avro.generic.GenericDatumReader.readArray(GenericDatumReader.java:298)
  at org.apache.avro.generic.GenericDatumReader.readWithoutConversion(GenericDatumReader.java:183)
  at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:160)
  at org.apache.avro.generic.GenericDatumReader.readWithoutConversion(GenericDatumReader.java:187)
  at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:160)
  at org.apache.avro.generic.GenericDatumReader.readField(GenericDatumReader.java:259)
  at org.apache.avro.generic.GenericDatumReader.readRecord(GenericDatumReader.java:247)
  at org.apache.avro.generic.GenericDatumReader.readWithoutConversion(GenericDatumReader.java:179)
  at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:160)
  at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:153)
  at org.apache.flink.formats.avro.RegistryAvroDeserializationSchema.deserialize(RegistryAvroDeserializationSchema.java:81)
  at org.apache.flink.formats.avro.AvroRowDataDeserializationSchema.deserialize(AvroRowDataDeserializationSchema.java:103)
  ... 9 more

Look in the attachments for a reproducer.

Same data serialized to a file works fine (look the filesystem example in the reproducer)