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Xinli Shang reassigned PARQUET-1656: ------------------------------------ External issue ID: PARQUET-1681 External issue URL: https://issues.apache.org/jira/browse/PARQUET-1681 Assignee: Xinli Shang > Schema change results in exception - java.lang.ClassCastException > ------------------------------------------------------------------ > > Key: PARQUET-1656 > URL: https://issues.apache.org/jira/browse/PARQUET-1656 > Project: Parquet > Issue Type: Bug > Components: parquet-avro > Affects Versions: 1.8.1, 1.12.0 > Environment: Hoodie/Parquet/Avro > Parquet-1.8.1 > Avro-1.7.6 > Reporter: Balajee Nagasubramaniam > Assignee: Xinli Shang > Priority: Major > Labels: Parquet, avro > > Following exception was seen with parquet 1.8.1 (and in parquet 1.12.0, when > trying to reproduce it). > Exception in thread "main" java.lang.ClassCastException: optional binary > phone_number (STRING) is not a group > at > com.uber.komondor.shaded.org.apache.parquet.schema.Type.asGroupType(Type.java:250) > at > com.uber.komondor.shaded.org.apache.parquet.avro.AvroRecordConverter.newConverter(AvroRecordConverter.java:279) > at > com.uber.komondor.shaded.org.apache.parquet.avro.AvroRecordConverter.newConverter(AvroRecordConverter.java:232) > at > com.uber.komondor.shaded.org.apache.parquet.avro.AvroRecordConverter.access$100(AvroRecordConverter.java:78) > at > org.apache.parquet.avro.AvroRecordConverter$AvroCollectionConverter$ElementConverter.<init>(AvroRecordConverter.java:536) > at > org.apache.parquet.avro.AvroRecordConverter$AvroCollectionConverter.<init>(AvroRecordConverter.java:486) > 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.newConverter(AvroRecordConverter.java:279) > 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 > util.ParquetToAvroSchemaConverter$.convert(ParquetToAvroSchemaConverter.scala:46) > at > util.ParquetToAvroSchemaConverter$.main(ParquetToAvroSchemaConverter.scala:20) > at util.ParquetToAvroSchemaConverter.main(ParquetToAvroSchemaConverter.scala) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:498) > at org.apache.hadoop.util.RunJar.run(RunJar.java:221) > at org.apache.hadoop.util.RunJar.main(RunJar.java:136) > Original exception was triggered by the following schema change. > Schema Before change: > { > "default": null, > "name": "master_cluster", > "type": [ > "null", > { > "fields": [ > { > "name": "uuid", > "type": "string" > }, > { > "name": "namespace", > "type": "string" > }, > { > "name": "version", > "type": "long" > } > ], > "name": "master_cluster", > "type": "record" > } > ] > }, > After schema change: > { > "default": null, > "name": "master_cluster", > "type": [ > "null", > { > "fields": [ > { > "default": null, > "name": "uuid", > "type": [ > "null", > "string" > ] > }, > { > "default": null, > "name": "namespace", > "type": [ > "null", > "string" > ] > }, > { > "default": null, > "name": "version", > "type": [ > "null", > "long" > ] > } > ], > "name": "VORGmaster_cluster", > "type": "record" > } > ] > }, > We were suspecting PARQUET-1441 could be in play and tried to reproduce the > issue on parquet-1.12.0 and seeing the same exception. > During the repro noticed that issue could be with avroSchema conversion > (field name was substituted with generic name "array"). While we look into > this further, want to get community input on whether this is a known issue > and any thoughts on path forward. > 19/09/12 22:34:37 DEBUG avro.SchemaCompatibility: Checking compatibility of > reader > {"type":"record","name":"IDphones_items","fields":[{"name":"phone_number","type":["null","string"],"default":null}]} > with writer > {"type":"record","name":"array","fields":[{"name":"phone_number","type":["null","string"],"default":null}]} -- This message was sent by Atlassian Jira (v8.3.4#803005)