ad1happy2go commented on issue #8916:
URL: https://github.com/apache/hudi/issues/8916#issuecomment-1596867879

   @xuCoCo You are correct. When the rows are not there it fallback to insert 
operation which is resulting in duplicate data. Even if the table has 
precombineKey, it is behaving like same. 
   
   This is the issue which should be addressed. Created JIRA - 
https://issues.apache.org/jira/browse/HUDI-6410
   
   <img width="1495" alt="image" 
src="https://github.com/apache/hudi/assets/63430370/ee0ffd03-af90-4e87-8410-9f969a918358";>
   


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