[AVRO-2125] AvroRuntimeException: Not a union

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Bug
• Assignee: Unassigned
• Reporter: Andreas Christodoulou
• Created: 04/Jan/18 10:51
• Updated: 16/Jan/18 13:04
• Resolved: 16/Jan/18 13:04

Description

I have an Avro schema which I am using as part of our Apache Beam pipeline tests, and using the avro-tools-1.8.2 tool I have generated random data from the Avro schema. In the tests I am using this data with the schema, but I get the following Java exception:

org.apache.avro.AvroRuntimeException: Not a union: {"type":"record","name":"sampleArrayRecord","namespace":"gamesys.sample","fields":[{"name":"sampleArrayRecordString","type":"string"}]}

I have attached the schema and the data I've used, and the relevant stacktrace is given below:

Caused by: com.fasterxml.jackson.databind.JsonMappingException: Not a union: {"type":"record","name":"sampleArrayRecord","namespace":"gamesys.sample","fields":[{"name":"sampleArrayRecordString","type":"string"}]} (through reference chain: com.google.api.services.bigquery.model.TableRow["sampleArray"]->org.apache.avro.generic.GenericData$Array[0]->org.apache.avro.generic.GenericData$Record["schema"]->org.apache.avro.Schema$RecordSchema["types"])
	at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:388)
	at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:348)
	at com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.java:343)
	at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:697)
	at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155)
	at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:704)
	at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:689)
	at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155)
	at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:149)
	at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:112)
	at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:25)
	at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields(MapSerializer.java:633)
	at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:536)
	at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:30)
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:292)
	at com.fasterxml.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:3697)
	at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3073)
	at org.apache.beam.sdk.io.gcp.bigquery.TableRowJsonCoder.encode(TableRowJsonCoder.java:49)
	at org.apache.beam.sdk.io.gcp.bigquery.TableRowJsonCoder.encode(TableRowJsonCoder.java:34)
	at org.apache.beam.sdk.util.CoderUtils.encodeToSafeStream(CoderUtils.java:93)
	... 22 more
Caused by: org.apache.avro.AvroRuntimeException: Not a union: {"type":"record","name":"sampleArrayRecord","namespace":"gamesys.sample","fields":[{"name":"sampleArrayRecordString","type":"string"}]}
	at org.apache.avro.Schema.getTypes(Schema.java:299)
	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 com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:664)
	at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:689)
	... 38 more

I am using the org.apache.avro:avro:1.8.1 library in the project.