tinaselenge commented on code in PR #17524:
URL: https://github.com/apache/kafka/pull/17524#discussion_r1858444833


##########
clients/src/main/java/org/apache/kafka/common/requests/DescribeClusterRequest.java:
##########
@@ -51,6 +52,13 @@ public String toString() {
     public DescribeClusterRequest(DescribeClusterRequestData data, short 
version) {
         super(ApiKeys.DESCRIBE_CLUSTER, version);
         this.data = data;
+        validateVersionForIncludingFencedBrokers(version, 
data.includeFencedBrokers());
+    }
+
+    private void validateVersionForIncludingFencedBrokers(short version, 
boolean includeFencedBrokers) {
+        if (version < 2 && includeFencedBrokers) {
+            throw new UnsupportedVersionException("Including fenced broker 
endpoints is not supported with version " + version);
+        }

Review Comment:
   I agree that checking the option instead of the error message is much better 
solution here. I made an update to add an error level log, instead of 
validating describe request and throwing a specific error for 
includeFencedBrokers option. 
   
   In terms of the integration test, I'm going to look into to it a little 
more. KRaftClusterTest.scala you pointed, seems like more cluster level tests. 
Since this is testing Admin specific option, it should probably be added to 
AdminIntegrationTest but I'm currently not sure how to set the test cluster's 
version or it's supported API version. 



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