guozhangwang commented on a change in pull request #10137:
URL: https://github.com/apache/kafka/pull/10137#discussion_r580786789
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File path: clients/src/main/java/org/apache/kafka/clients/consumer/Consumer.java
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@@ -243,6 +244,11 @@
*/
Map<TopicPartition, Long> endOffsets(Collection<TopicPartition>
partitions, Duration timeout);
+ /**
+ * @see KafkaConsumer#currentLag(TopicPartition)
+ */
+ OptionalLong currentLag(TopicPartition topicPartition);
Review comment:
If we concern that users may call this function too frequent looping a
large number of partitions, and each call is synchronizing on the subscription
state, then maybe we can make it in a batching mode.
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