nsivabalan commented on issue #2675:
URL: https://github.com/apache/hudi/issues/2675#issuecomment-804177670


   Yeah, hudi just relies on Avro's schema compatibility in general. From the 
[specification](http://avro.apache.org/docs/current/spec.html#Schema+Resolution),
 looks like adding a new field w/o default will error out. 
   ```
   if the reader's record schema has a field with no default value, and 
writer's schema does not have a field with the same name, an error is signalled.
   ```


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