squah-confluent commented on code in PR #21558:
URL: https://github.com/apache/kafka/pull/21558#discussion_r2881612289
##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/Utils.java:
##########
@@ -201,17 +231,68 @@ public static
List<ConsumerGroupHeartbeatRequestData.TopicPartitions> toTopicPar
}
/**
- * Creates a map of topic id and partition set from a list of consumer
group TopicPartitions.
+ * Creates a map of topic id and partition with assignment epochs from a
list of consumer group TopicPartitions.
*
- * @param topicPartitionsList The list of TopicPartitions.
- * @return a map of topic id and partition set.
+ * @param topicPartitions The list of TopicPartitions.
+ * @param defaultEpoch The default epoch to use when the epoch information
is not available for a partition.
+ * @return a map of topic id and partitions with assignment epochs.
*/
- public static Map<Uuid, Set<Integer>> assignmentFromTopicPartitions(
- List<ConsumerGroupCurrentMemberAssignmentValue.TopicPartitions>
topicPartitionsList
+ public static Map<Uuid, Map<Integer, Integer>>
assignmentFromTopicPartitions(
+ List<ConsumerGroupCurrentMemberAssignmentValue.TopicPartitions>
topicPartitions,
+ int defaultEpoch
) {
- return topicPartitionsList.stream().collect(Collectors.toMap(
- ConsumerGroupCurrentMemberAssignmentValue.TopicPartitions::topicId,
- topicPartitions -> Collections.unmodifiableSet(new
HashSet<>(topicPartitions.partitions()))));
+ // For legacy static member, the defaultEpoch could be -2
(LEAVE_GROUP_STATIC_MEMBER_EPOCH).
+ // But we want to ensure the default memberEpoch assigned is
non-negative.
+ int adjustedDefaultEpoch = Math.max(defaultEpoch, 0);
+ Map<Uuid, Map<Integer, Integer>> assignmentWithEpochs = new
HashMap<>();
+ for (ConsumerGroupCurrentMemberAssignmentValue.TopicPartitions tp :
topicPartitions) {
+ Map<Integer, Integer> partitionEpochs = new HashMap<>();
+ List<Integer> partitions = tp.partitions();
+ List<Integer> epochs = tp.assignmentEpochs();
+ if (epochs != null && !epochs.isEmpty() && epochs.size() !=
partitions.size()) {
Review Comment:
Following up on @lucasbru's comment. Should we allow an empty, not-null
epochs array when partitions is not empty?
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