NPE in Java, RecordBuilderBase.defaultValue
-------------------------------------------
Key: AVRO-999
URL: https://issues.apache.org/jira/browse/AVRO-999
Project: Avro
Issue Type: Bug
Components: java
Affects Versions: 1.6.1
Environment: Java
Reporter: Jay Rutten
If you have a union with a default of null, the code in
RecordBuilderBase.defaultValue will cause an NPE in ConcurrentHashMap, since it
is trying to add a null to the map.
Sample union:
{code}
record Sample {
union{null, string} value = null;
}
{code}
Code:
{code}
// If not cached, get the default Java value by encoding the default JSON
// value and then decoding it:
if (defaultValue == null) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
encoder = EncoderFactory.get().binaryEncoder(baos, encoder);
ResolvingGrammarGenerator.encode(encoder, field.schema(), defaultJsonValue);
encoder.flush();
decoder = DecoderFactory.get().binaryDecoder(baos.toByteArray(), decoder);
defaultValue = new GenericDatumReader(field.schema()).read(null, decoder);
defaultSchemaValues.putIfAbsent(field.pos(), defaultValue); // <-- NPE from
here
}
{code}
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