showuon commented on code in PR #17524:
URL: https://github.com/apache/kafka/pull/17524#discussion_r1867451720


##########
clients/src/main/java/org/apache/kafka/clients/admin/KafkaAdminClient.java:
##########
@@ -2554,6 +2557,12 @@ boolean handleUnsupportedVersionException(final 
UnsupportedVersionException exce
                     return false;
                 }
 
+                // If unsupportedVersion exception was caused by the option to 
include fenced brokers (only supported for version 1+)

Review Comment:
   supported for version 2+?



##########
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:
   Hmm... it's quite complicated to have a integration test to test with lower 
describeCluster version. I think it's fine sine we already have unit test to 
cover it. Thanks.



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