PoJo to Avro Serialization throw KryoException: java.lang.UnsupportedOperationException - apache-flink

Question

My Unit test was running OK under Flink 1.11.2 with parquet-avro 1.10.0, once I upgrade to 1.12.0 with parquet-avro 1.12.0, my unit test will throw
com.esotericsoftware.kryo.KryoException: java.lang.UnsupportedOperationException
Serialization trace:
reserved (org.apache.avro.Schema$Field)
fieldMap (org.apache.avro.Schema$RecordSchema)
schema (org.apache.avro.generic.GenericData$Record)
at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:125) ~[kryo-2.24.0.jar:?]
at com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:528) ~[kryo-2.24.0.jar:?]
at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:761) ~[kryo-2.24.0.jar:?]
at com.esotericsoftware.kryo.serializers.MapSerializer.read(MapSerializer.java:143) ~[kryo-2.24.0.jar:?]
at com.esotericsoftware.kryo.serializers.MapSerializer.read(MapSerializer.java:21) ~[kryo-2.24.0.jar:?]
at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:679) ~[kryo-2.24.0.jar:?]
...
aused by: java.lang.UnsupportedOperationException
at java.util.Collections$UnmodifiableCollection.add(Collections.java:1057) ~[?:1.8.0_282]
at com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:109) ~[kryo-2.24.0.jar:?]
at com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:22) ~[kryo-2.24.0.jar:?]
at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:679) ~[kryo-2.24.0.jar:?]
at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:106) ~[kryo-2.24.0.jar:?]
... 27 more
My Unit test code snippet is something like below:
private ImmutableList<PoJo> testData = ImmutableList.of(
PoJo.build("123", "0.0.0.0", null),
PoJo.build("123", "0.0.0.1", 2L)
);
DataStream<PoJo> input = env
.addSource(new TestSource(testData), PojoTypeInfo.of(PoJo.class))
.assignTimestampsAndWatermarks(watermarkStrategy);
DataStream<GenericRecord> output = input
.map(TestClass::convertPoJoToGenericRecord)
.returns(new GenericRecordAvroTypeInfo(PoJo.getAvroSchema()));
output.addSink();
The function is something like
GenericRecord convertPoJoToGenericRecord(PoJo pojo) throws Exception {
Schema schema = PoJo.getAvroSchema();
GenericRecordBuilder builder = new GenericRecordBuilder(schema);
for (Schema.Field field : schema.getFields()) {
builder.set(field.name(), TestClass.getObjectField(field, pojo));
}
GenericRecord record = builder.build();
return record;
}
Can anyone help on this?
Thank you.