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https://issues.apache.org/jira/browse/PARQUET-1679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16956249#comment-16956249
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Felix Kizhakkel Jose edited comment on PARQUET-1679 at 10/21/19 4:37 PM:
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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_
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