How to fix Expected start-union. Got VALUE_NUMBER_INT when converting JSON to Avro on the command line?

Question

I\'m trying to validate a JSON file using an Avro schema and write the corresponding Avro file. First, I\'ve defined the following Avro schema named user.avsc:<

Answer 1

I have implemented union and its validation , just create a union schema and pass its values through postman . resgistry url is the url which you specify for properties of kafka , u also can pass dynamic values to your schema

RestTemplate template = new RestTemplate();
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity entity = new HttpEntity(headers);
        ResponseEntity response = template.exchange(""+registryUrl+"/subjects/"+topic+"/versions/"+version+"", HttpMethod.GET, entity, String.class);
        String responseData = response.getBody();
        JSONObject jsonObject = new JSONObject(responseData);
        JSONObject jsonObjectResult = new JSONObject(jsonResult);
        String getData = jsonObject.get("schema").toString();
        Schema.Parser parser = new Schema.Parser();
        Schema schema = parser.parse(getData);
        GenericRecord genericRecord = new GenericData.Record(schema);
        schema.getFields().stream().forEach(field->{
            genericRecord.put(field.name(),jsonObjectResult.get(field.name()));
        });
        GenericDatumReaderreader = new GenericDatumReader(schema);
        boolean data = reader.getData().validate(schema,genericRecord );