[GitHub] [hudi] stym06 commented on issue #2265: Arrays with nulls in them result in broken parquet files

[GitBox <gi...@apache.org>]

stym06 commented on issue #2265:
URL: https://github.com/apache/hudi/issues/2265#issuecomment-949826677


   We are facing the same issue. Seems like this is happening for nulls in array datatype. We are fetching the schema from confluent schema registry where the datatype is array
   ```
   {
   	"name":"ecu_version",
   	"type":[{"type":"array","items":{"type":"record","name":"ecu_version_record","fields":[{"name":"ecu_type","type":["null","string"],"default":null
   }
   ```
   
   ```
   Caused by: java.lang.ClassCastException: optional binary generic (UTF8) is not a group
   	at org.apache.parquet.schema.Type.asGroupType(Type.java:207)
   	at org.apache.parquet.avro.AvroRecordConverter$MapConverter.<init>(AvroRecordConverter.java:930)
   	at org.apache.parquet.avro.AvroRecordConverter.newConverter(AvroRecordConverter.java:292)
   	at org.apache.parquet.avro.AvroRecordConverter.<init>(AvroRecordConverter.java:141)
   	at org.apache.parquet.avro.AvroRecordConverter.newConverter(AvroRecordConverter.java:279)
   	at org.apache.parquet.avro.AvroRecordConverter.newConverter(AvroRecordConverter.java:232)
   	at org.apache.parquet.avro.AvroRecordConverter.access$100(AvroRecordConverter.java:78)
   	at org.apache.parquet.avro.AvroRecordConverter$AvroCollectionConverter.<init>(AvroRecordConverter.java:477)
   	at org.apache.parquet.avro.AvroRecordConverter.newConverter(AvroRecordConverter.java:289)
   	at org.apache.parquet.avro.AvroRecordConverter.<init>(AvroRecordConverter.java:141)
   	at org.apache.parquet.avro.AvroRecordConverter.<init>(AvroRecordConverter.java:95)
   	at org.apache.parquet.avro.AvroRecordMaterializer.<init>(AvroRecordMaterializer.java:33)
   	at org.apache.parquet.avro.AvroReadSupport.prepareForRead(AvroReadSupport.java:138)
   	at org.apache.parquet.hadoop.InternalParquetRecordReader.initialize(InternalParquetRecordReader.java:183)
   	at org.apache.parquet.hadoop.ParquetReader.initReader(ParquetReader.java:156)
   	at org.apache.parquet.hadoop.ParquetReader.read(ParquetReader.java:135)
   	at org.apache.hudi.common.util.ParquetReaderIterator.hasNext(ParquetReaderIterator.java:49)
   	at org.apache.hudi.common.util.queue.IteratorBasedQueueProducer.produce(IteratorBasedQueueProducer.java:45)
   	at org.apache.hudi.common.util.queue.BoundedInMemoryExecutor.lambda$null$0(BoundedInMemoryExecutor.java:92)
   	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   	... 4 more
   ```


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