horizonzy opened a new pull request, #2013:
URL: https://github.com/apache/avro/pull/2013

   ```
       @Data
       @AllArgsConstructor
       @NoArgsConstructor
       public static class Person {
           String name;
           int age;
           String address;
           double score;
       }
   
       @Data
       @AllArgsConstructor
       @NoArgsConstructor
       public static class PersonV2 {
           String name;
           int age;
           String address;
           double score;
   
           @Nullable
           String country;
           @Nullable
           int phone;
           @Nullable
           double salary;
       }
   ```
   
   Use personV2 schema to read personV1 data; it will throw NPE.
   
   
   When the basic type value is null, use the default value to populate it.
   


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