zhaohaidao commented on code in PR #14271:
URL: https://github.com/apache/kafka/pull/14271#discussion_r1314219391


##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupCoordinatorService.java:
##########
@@ -428,9 +430,44 @@ public CompletableFuture<ListGroupsResponseData> 
listGroups(
             return 
FutureUtils.failedFuture(Errors.COORDINATOR_NOT_AVAILABLE.exception());
         }
 
-        return FutureUtils.failedFuture(Errors.UNSUPPORTED_VERSION.exception(
-            "This API is not implemented yet."
-        ));
+        List<CompletableFuture<ListGroupsResponseData>> futures = new 
java.util.ArrayList<>(Collections.emptyList());
+        for (TopicPartition tp : runtime.partitions()) {
+            futures.add(runtime.scheduleReadOperation(
+                "list_groups",
+                tp,
+                (coordinator, lastCommittedOffset) -> 
coordinator.listGroups(context, request, lastCommittedOffset)
+            ).exceptionally(exception -> {
+                if (!(exception instanceof KafkaException)) {
+                    log.error("ListGroups request {} hit an unexpected 
exception: {}",
+                        request, exception.getMessage());
+                }
+                return new ListGroupsResponseData()
+                    .setErrorCode(Errors.forException(exception).code());
+            }));

Review Comment:
   done.



##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupCoordinatorService.java:
##########
@@ -428,9 +430,44 @@ public CompletableFuture<ListGroupsResponseData> 
listGroups(
             return 
FutureUtils.failedFuture(Errors.COORDINATOR_NOT_AVAILABLE.exception());
         }
 
-        return FutureUtils.failedFuture(Errors.UNSUPPORTED_VERSION.exception(
-            "This API is not implemented yet."
-        ));
+        List<CompletableFuture<ListGroupsResponseData>> futures = new 
java.util.ArrayList<>(Collections.emptyList());
+        for (TopicPartition tp : runtime.partitions()) {
+            futures.add(runtime.scheduleReadOperation(
+                "list_groups",

Review Comment:
   done.



##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupCoordinatorService.java:
##########
@@ -428,9 +430,44 @@ public CompletableFuture<ListGroupsResponseData> 
listGroups(
             return 
FutureUtils.failedFuture(Errors.COORDINATOR_NOT_AVAILABLE.exception());
         }
 
-        return FutureUtils.failedFuture(Errors.UNSUPPORTED_VERSION.exception(
-            "This API is not implemented yet."
-        ));
+        List<CompletableFuture<ListGroupsResponseData>> futures = new 
java.util.ArrayList<>(Collections.emptyList());

Review Comment:
   done.



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