showuon commented on pull request #10977:
URL: https://github.com/apache/kafka/pull/10977#issuecomment-875220116


   @wuYin 
   
   > This small change is mainly to unify the way to determine if the user has 
set the default value
   
   Yes, I know, so I think this line should also be updated.
   
https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/common/config/ConfigDef.java#L1146
   
   ```
   NO_DEFAULT_VALUE.equals(defaultValue) ? NO_DEFAULT_VALUE : parseType(name, 
defaultValue, type);
   ```
   It is also trying to determine if the default value is set, so, we can 
update to:
   ```
   hasDefault() ?  parseType(name, defaultValue, type) : NO_DEFAULT_VALUE;
   ```
   
   What do you think?


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