[AVRO-1532] Field deletion not possible for ReflectData: NPE

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.7.6
• Component/s: java
• Labels: java reflection
• Assignee: Unassigned
• Reporter: O. Reißig
• Created: 24/Jun/14 06:58
• Updated: 14/Jul/14 11:55

Description

Actual behaviour:
I have a field in my reflection-based schema like this:

@Nullable @AvroDefault("null")
public Long someField;

When removing this field, parsing the previous serialized blob yields NullPointerException:

java.lang.NullPointerException
	at org.apache.avro.reflect.ReflectData.setField(ReflectData.java:128)
	at org.apache.avro.generic.GenericDatumReader.readField(GenericDatumReader.java:193)
	at org.apache.avro.reflect.ReflectDatumReader.readField(ReflectDatumReader.java:230)
	at org.apache.avro.generic.GenericDatumReader.readRecord(GenericDatumReader.java:183)
	at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:151)
	at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:142)
	at org.apache.avro.file.DataFileStream.next(DataFileStream.java:233)
	at org.apache.avro.file.DataFileStream.next(DataFileStream.java:220)
	at ReflectDataFieldRemovalTest.testFieldRemoval(ReflectDataFieldRemovalTest.java:41)

Expected behaviour:
Field removal is crucial for schema evolution and must be possible with ReflectData.