ElliotVilhelm edited a comment on issue #9882: [FLINK-14380][Flink-Core] Type 
Extractor Setter
URL: https://github.com/apache/flink/pull/9882#issuecomment-542474533
 
 
   @aljoscha Thanks for the response! That makes sense. I am seeing this output 
in our Scala application on launch for most case classes.
   
   ```
   MyCaseClass.scala cannot be used as a POJO type because not all fields are 
valid POJO fields, and must be processed as GenericType.
   ```
   We are using case classes so I was confused. I had isolated this output to 
here which I realize in in the Java api:
   
https://github.com/apache/flink/blob/80b27a150026b7b5cb707bd9fa3e17f565bb8112/flink-core/src/main/java/org/apache/flink/api/java/typeutils/TypeExtractor.java#L1857
   
   Perhaps this is a bug or likely I am misunderstanding something? 😄 

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