harryfallows commented on code in PR #16280:
URL: https://github.com/apache/kafka/pull/16280#discussion_r1639672823


##########
core/src/main/scala/kafka/server/ConfigHandler.scala:
##########
@@ -239,19 +239,24 @@ class BrokerConfigHandler(private val brokerConfig: 
KafkaConfig,
 
   def processConfigChanges(brokerId: String, properties: Properties): Unit = {
     def getOrDefault(prop: String): Long = {
-      if (properties.containsKey(prop))
-        properties.getProperty(prop).toLong
-      else
-        QuotaConfigs.QUOTA_BYTES_PER_SECOND_DEFAULT
+      brokerConfig.dynamicConfig.currentDynamicBrokerConfigs get prop match {

Review Comment:
   Do you mean do something similar to the `TopicConfigHandler` 
`processConfigChanges` method where the update is done in the helper function? 
In this case we could call `updateQuota` only if the value or defaultValue has 
changed. Doing the same logic but keeping the `getOrDefault` method will just 
be a few if statements at the end, which won't be the nicest.



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