[AVRO-1153] Exception when trying to write object with Nullable field that is of Stringable type

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7.2
• Fix Version/s: 1.7.2
• Component/s: java
• Labels: newbie reflection
• Assignee: Alexandre Normand
• Reporter: Alexandre Normand
• Created: 11/Sep/12 00:02
• Updated: 25/Sep/12 21:16
• Resolved: 12/Sep/12 23:54

Description

There seems to be an issue with stringable fields that are nullable. I'm mostly using ReflectData.AllowNull in my real usage of this feature and I'm seeing it fail with this:

org.apache.avro.AvroRuntimeException: Unknown datum type: 10
	at org.apache.avro.generic.GenericData.getSchemaName(GenericData.java:574)
	at org.apache.avro.generic.GenericData.resolveUnion(GenericData.java:539)
	at org.apache.avro.generic.GenericDatumWriter.resolveUnion(GenericDatumWriter.java:137)
	at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:70)
	at org.apache.avro.reflect.ReflectDatumWriter.write(ReflectDatumWriter.java:104)
	at org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:105)
	at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:65)
	at org.apache.avro.reflect.ReflectDatumWriter.write(ReflectDatumWriter.java:104)
	at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:57)

Here's a quick test that shows this problem:

public static class N1 {
      BigDecimal number;
  }

  @Test public void testNullableStringableField() throws Exception {
      N1 datum = new N1();
      datum.number = BigDecimal.TEN;

      checkBinary(ReflectData.AllowNull.get(), ReflectData.AllowNull.get().getSchema(N1.class), datum, false);
  }