chia7712 commented on code in PR #15766:
URL: https://github.com/apache/kafka/pull/15766#discussion_r1590222768


##########
tools/src/main/java/org/apache/kafka/tools/consumer/group/ConsumerGroupCommand.java:
##########
@@ -430,7 +430,7 @@ private void printStates(Map<String, GroupState> states) {
                     String format = "\n%" + -coordinatorColLen + "s %-25s 
%-20s %-15s %s";
 
                     System.out.printf(format, "GROUP", "COORDINATOR (ID)", 
"ASSIGNMENT-STRATEGY", "STATE", "#MEMBERS");
-                    System.out.printf(format, state.group, coordinator, 
state.assignmentStrategy, state.state, state.numMembers);
+                    System.out.printf(format, state.group, coordinator, 
state.assignmentStrategy, state.state.name(), state.numMembers);

Review Comment:
   Sorry that we should use `toString()` instead of `name()`



##########
core/src/test/java/kafka/test/ClusterInstance.java:
##########
@@ -145,4 +153,18 @@ default Admin createAdminClient() {
     void startBroker(int brokerId);
 
     void waitForReadyBrokers() throws InterruptedException;
+
+    default Set<GroupProtocol> supportedGroupProtocols() {

Review Comment:
   Could you please add test for it? `ClusterTestExtensionsTest` is a goo place 
:)



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