yunchipang commented on code in PR #19867:
URL: https://github.com/apache/kafka/pull/19867#discussion_r2153326295


##########
core/src/main/scala/kafka/server/ConfigHelper.scala:
##########
@@ -86,19 +81,34 @@ class ConfigHelper(metadataCache: MetadataCache, config: 
KafkaConfig, configRepo
                       includeSynonyms: Boolean,
                       includeDocumentation: Boolean): 
List[DescribeConfigsResponseData.DescribeConfigsResult] = {
     resourceToConfigNames.map { resource =>
-
-      def createResponseConfig(configs: Map[String, Any],
+      def createResponseConfig(configs: Any,
                                createConfigEntry: (String, Any) => 
DescribeConfigsResponseData.DescribeConfigsResourceResult): 
DescribeConfigsResponseData.DescribeConfigsResult = {
-        val filteredConfigPairs = if (resource.configurationKeys == null || 
resource.configurationKeys.isEmpty)
-          configs.toBuffer
-        else
-          configs.filter { case (configName, _) =>
-            resource.configurationKeys.asScala.contains(configName)
-          }.toBuffer
+        val stream = configs match {
+          case c: AbstractConfig =>
+            val nonInternalStream = c.nonInternalValues.entrySet.stream()
+            val originalsFiltered = c.originals.entrySet.stream()
+              .filter(e =>
+                e.getValue != null &&
+                  !c.nonInternalValues.containsKey(e.getKey) // exclude keys 
already in nonInternalValues

Review Comment:
   @chia7712 thanks for the clarification! updated.



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