rreddy-22 commented on code in PR #14099:
URL: https://github.com/apache/kafka/pull/14099#discussion_r1275226238
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group-coordinator/src/main/java/org/apache/kafka/coordinator/group/RecordHelpers.java:
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@@ -131,13 +131,24 @@ public static Record newGroupSubscriptionMetadataRecord(
Map<String, TopicMetadata> newSubscriptionMetadata
) {
ConsumerGroupPartitionMetadataValue value = new
ConsumerGroupPartitionMetadataValue();
- newSubscriptionMetadata.forEach((topicName, topicMetadata) ->
+ newSubscriptionMetadata.forEach((topicName, topicMetadata) -> {
+ List<ConsumerGroupPartitionMetadataValue.PartitionMetadata>
partitionMetadata = new ArrayList<>();
+ if (!topicMetadata.partitionRacks().isEmpty()) {
+ topicMetadata.partitionRacks().forEach((partition, racks) -> {
+ partitionMetadata.add(new
ConsumerGroupPartitionMetadataValue.PartitionMetadata()
+ .setPartition(partition)
+ .setRacks(new ArrayList<>(racks))
+ );
+ });
+ }
+ // If partition rack information is empty, store an empty list in
the record.
value.topics().add(new
ConsumerGroupPartitionMetadataValue.TopicMetadata()
.setTopicId(topicMetadata.id())
.setTopicName(topicMetadata.name())
.setNumPartitions(topicMetadata.numPartitions())
- )
- );
+ .setPartitionMetadata(partitionMetadata.isEmpty() ?
Collections.emptyList() : partitionMetadata)
Review Comment:
I thought we prefer Collections.emptyList over new ArrayList()
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