I have an avro schema. While compiling it, the model class comes into existence in Java, let’s call it Test1 class.

When serializing the Test instances like this:
Test1 test1.getEncoder().encode(); it generates a byte stream that is a bit longer then the byte stream generated by

    private void serialiseToByteStream(Test1 test1) throws IOException {
        byte[] bytes = null;
        try {
            if (test1 != null) {
                ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
                BinaryEncoder binaryEncoder = EncoderFactory.get().binaryEncoder(byteArrayOutputStream, null);
                DatumWriter<Test1> notizDatumWriter = new SpecificDatumWriter<Test1>(Test1.class);

                notizDatumWriter.write(test1, binaryEncoder);
                binaryEncoder.flush();
                byteArrayOutputStream.close();
                bytes = byteArrayOutputStream.toByteArray();
                LOGGER.info("serialized Test1 object ='{}'", DatatypeConverter.printHexBinary(bytes));

                Files.write(Paths.get("path/to/file"), bytes);
            }
        } catch (Exception e) {
            LOGGER.error("Unable to serialize ", e);
        }
    }

The byte stream created by the encode() method seems to have a prefix compared to the byte stream produced by the SpecificDatumWriter. I cannot find any documentation that would define this. Can I cut off this prefix somehow from the byte stream while producing it with the encode()?