goutamadwant commented on issue #12008:
URL: https://github.com/apache/seatunnel/issues/12008#issuecomment-5470811219

   @davidzollo @DanielLeens I reproduced this production defect on the current 
`dev` branch with both JDK 8 and JDK 11. The same hard failure occurs for a 
top-level field such as `CustomerID` and a nested field such as `InnerID`: 
schema generation preserves exact field case, but `RowToAvroConverter` 
lowercases the lookup name, so Avro serialization fails before producing output.
   
   I prepared a focused fix #12009 that uses the schema's exact field names in 
both writer paths and adds byte-level round-trip coverage for case-distinct 
top-level fields and nested mixed-case fields. The Avro module passes on JDK 8 
and JDK 11, and the Kafka/Pulsar dependency reactor passes on JDK 8.
   
   Let me know your thoughts or any suggestions! 
   


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