libenchao commented on a change in pull request #12428:
URL: https://github.com/apache/flink/pull/12428#discussion_r433593166
##########
File path:
flink-formats/flink-avro/src/main/java/org/apache/flink/formats/avro/AvroRowDeserializationSchema.java
##########
@@ -157,13 +150,13 @@ public AvroRowDeserializationSchema(String
avroSchemaString) {
record = new GenericData.Record(schema);
datumReader = new GenericDatumReader<>(schema);
inputStream = new MutableByteArrayInputStream();
- decoder = DecoderFactory.get().binaryDecoder(inputStream, null);
}
@Override
public Row deserialize(byte[] message) throws IOException {
try {
inputStream.setBuffer(message);
+ Decoder decoder =
DecoderFactory.get().binaryDecoder(inputStream, null);
Review comment:
AvroRowDataDeserializationSchema should also be considered.
##########
File path:
flink-formats/flink-avro/src/main/java/org/apache/flink/formats/avro/AvroRowDeserializationSchema.java
##########
@@ -157,13 +150,13 @@ public AvroRowDeserializationSchema(String
avroSchemaString) {
record = new GenericData.Record(schema);
datumReader = new GenericDatumReader<>(schema);
inputStream = new MutableByteArrayInputStream();
- decoder = DecoderFactory.get().binaryDecoder(inputStream, null);
}
@Override
public Row deserialize(byte[] message) throws IOException {
try {
inputStream.setBuffer(message);
+ Decoder decoder =
DecoderFactory.get().binaryDecoder(inputStream, null);
Review comment:
Do you known the overhead of
`DecoderFactory.get().binaryDecoder(inputStream, null);`?
If it's heavy, maybe we can get a new decoder when encounters a schema
change exception?
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