chia7712 commented on code in PR #16899:
URL: https://github.com/apache/kafka/pull/16899#discussion_r1804783310


##########
clients/src/main/java/org/apache/kafka/clients/consumer/ConsumerConfig.java:
##########
@@ -727,6 +731,20 @@ private void checkGroupRemoteAssignor() {
         }
     }
 
+    @SuppressWarnings("unchecked")
+    private void checkPartitionAssigmentStrategy() {
+        List<Object> assignmentStrategies = (List<Object>) 
get(PARTITION_ASSIGNMENT_STRATEGY_CONFIG);
+        if 
(getString(GROUP_PROTOCOL_CONFIG).equalsIgnoreCase(GroupProtocol.CONSUMER.name()))
 {
+            if (PARTITION_ASSIGNOR_DEFAULT_VALUE.size() != 
assignmentStrategies.size() ||
+                    !PARTITION_ASSIGNOR_DEFAULT_VALUE.stream()
+                            .allMatch(clz -> assignmentStrategies.stream()
+                                    .anyMatch(obj -> clz.equals(obj) || 
clz.getName().equals(obj)))
+            ) {
+                throw new ConfigException(PARTITION_ASSIGNMENT_STRATEGY_CONFIG 
+ " cannot be set when " + GROUP_PROTOCOL_CONFIG + "=" + 
GroupProtocol.CONSUMER.name());
+            }
+        }
+    }
+

Review Comment:
   @m1a2st I think this comment can be addressed in a follow-up 
(https://issues.apache.org/jira/browse/KAFKA-17821). Could you please revert 
the related changes? Sorry for complicating this PR.



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