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Felix Kizhakkel Jose edited comment on PARQUET-1679 at 10/21/19 4:37 PM: ------------------------------------------------------------------------- When you mention _"You could just use a `byte[]` instead of `UUID` for your `id` field.", do you mean I have to change the type of the id field in model to byte[] instead of UUID for example:_ @Data public class Employee { private *byte[]* id; private String name; private int age; private Address address; } _instead of :_ @Data public class Employee { private *UUID* id; private String name; private int age; private Address address; } _ was (Author: felixkjose): When you mention _"You could just use a `byte[]` instead of `UUID` for your `id` field.", do you mean I have to change the type of the id field in model to byte[] instead of UUID for example:_ @Data public class Employee _{ private *byte[] id*; private String name; private int age; private Address address; }_ _instead of :_ @Data public class Employee _{ private *UUID id*; private String name; private int age; private Address address; }_ > Invalid SchemaException for UUID while using AvroParquetWriter > -------------------------------------------------------------- > > Key: PARQUET-1679 > URL: https://issues.apache.org/jira/browse/PARQUET-1679 > Project: Parquet > Issue Type: Bug > Components: parquet-avro > Affects Versions: 1.10.1 > Reporter: Felix Kizhakkel Jose > Priority: Major > > Hi, > I am getting org.apache.parquet.schema.InvalidSchemaException: Cannot write a > schema with an empty group: optional group id {} while I include a UUID field > on my POJO object. Without UUID everything worked fine. I have seen Parquet > suports UUID as part of [#PR-71] on 2.4 release. > But I am getting InvalidSchemaException on UUID. Is there anything that I am > missing or its a known issue? > *My setup details:* > *gradle dependency :* > dependencies > { compile group: 'org.springframework.boot', name: 'spring-boot-starter' > compile group: 'org.projectlombok', name: 'lombok', version: '1.16.6' compile > group: 'com.amazonaws', name: 'aws-java-sdk-bundle', version: '1.11.271' > compile group: 'org.apache.parquet', name: 'parquet-avro', version: '1.10.1' > compile group: 'org.apache.hadoop', name: 'hadoop-common', version: '3.1.1' > compile group: 'org.apache.hadoop', name: 'hadoop-aws', version: '3.1.1' > compile group: 'org.apache.hadoop', name: 'hadoop-client', version: '3.1.1' > compile group: 'joda-time', name: 'joda-time' compile group: > 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.6.5' > compile group: 'com.fasterxml.jackson.datatype', name: > 'jackson-datatype-joda', version: '2.6.5' } > *Model used:* > @Data > public class Employee > { private UUID id; private String name; private int age; private Address > address; } > @Data > public class Address > { private String streetName; private String city; private Zip zip; } > @Data > public class Zip > { private int zip; private int ext; } > > +*My Serializer Code:*+ > public void serialize(List<D> inputDataToSerialize, CompressionCodecName > compressionCodecName) throws IOException { > Path path = new > Path("s3a://parquetpoc/data_"++compressionCodecName++".parquet"); > Class clazz = inputDataToSerialize.get(0).getClass(); > try (ParquetWriter<D> writer = AvroParquetWriter.<D>builder(path) > .withSchema(ReflectData.AllowNull.get().getSchema(clazz)) // generate > nullable fields > .withDataModel(ReflectData.get()) > .withConf(parquetConfiguration) > .withCompressionCodec(compressionCodecName) > .withWriteMode(OVERWRITE) > .withWriterVersion(ParquetProperties.WriterVersion.PARQUET_2_0) > .build()) { > for (D input : inputDataToSerialize) > { writer.write(input); } > } > } > private List<Employee> *getInputDataToSerialize*(){ > Address address = new Address(); > address.setStreetName("Murry Ridge Dr"); > address.setCity("Murrysville"); > Zip zip = new Zip(); > zip.setZip(15668); > zip.setExt(1234); > address.setZip(zip); > List<Employee> employees = new ArrayList<>(); > IntStream.range(0, 100000).forEach(i-> > { Employee employee = new Employee(); // employee.setId(UUID.randomUUID()); > employee.setAge(20); employee.setName("Test"+i); > employee.setAddress(address); employees.add(employee); } > ); > return employees; > } > _**Where generic Type D is Employee_ -- This message was sent by Atlassian Jira (v8.3.4#803005)