chia7712 commented on a change in pull request #8826:
URL: https://github.com/apache/kafka/pull/8826#discussion_r446547308



##########
File path: 
clients/src/main/java/org/apache/kafka/common/network/ChannelBuilders.java
##########
@@ -159,24 +159,23 @@ private static ChannelBuilder create(SecurityProtocol 
securityProtocol,
     }
 
     // Visibility for testing
+    @SuppressWarnings("unchecked")
     protected static Map<String, Object> channelBuilderConfigs(final 
AbstractConfig config, final ListenerName listenerName) {
-        Map<String, ?> parsedConfigs;
+        Map<String, Object> parsedConfigs;

Review comment:
       > Does it make sense to just change the logging
   
   Pardon me, I failed to get your point.
   
   > And in terms of misleading, does this log confuse the user by any chance?
   
   for example, the ssl-related configs used to create ssl protocol are viewed 
as *unknown* when creating ```KafkaAdmin```.
   
   > why does convert the type of config will change the way we interpret the 
config value?
   
   the fix is unrelated to the type of config. The ```configs``` returned by 
this method is changed to the inner map (```RecordingMap```) of 
```AbstractConfig``` so the keys used to call ```Map#get``` will be added to 
*used list* of ```AbstractConfig```. 




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