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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