xijiu commented on code in PR #20064:
URL: https://github.com/apache/kafka/pull/20064#discussion_r2204107742
##########
tools/src/main/java/org/apache/kafka/tools/consumer/group/ConsumerGroupCommand.java:
##########
@@ -631,7 +634,34 @@ else if (logEndOffsetResult.getValue() instanceof
OffsetsUtils.Ignore)
return null;
throw new IllegalStateException("Unknown LogOffset subclass: "
+ logEndOffsetResult.getValue());
- }).collect(Collectors.toList());
+ }).toList();
+
+ // prepare data for partitions without leaders
+ List<PartitionAssignmentState> noneLeaderAssignments =
topicPartitionsWithoutLeader.stream()
+ .map(tp -> getDescribePartitionResult.apply(tp,
Optional.empty())).toList();
+
+ // concat the data and then sort them
+ return Stream.concat(existLeaderAssignments.stream(),
noneLeaderAssignments.stream())
+ .sorted(Comparator.<PartitionAssignmentState,
String>comparing(
+ state -> state.topic.orElse(""), String::compareTo)
Review Comment:
It maybe not allowed, it will receive a exception
`org.apache.kafka.common.errors.InvalidTopicException: The given topic name ''
cannot be represented in a request` when set the empty to a topic name
// org.apache.kafka.clients.admin.KafkaAdminClient#topicNameIsUnrepresentable
```
private static boolean topicNameIsUnrepresentable(String topicName) {
return topicName == null || topicName.isEmpty();
}
```
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