dongnuo123 commented on code in PR #18717:
URL: https://github.com/apache/kafka/pull/18717#discussion_r1931020413
##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/metrics/GroupCoordinatorMetricsShard.java:
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@@ -71,7 +71,7 @@ public TimelineGaugeCounter(TimelineLong timelineLong,
AtomicLong atomicLong) {
/**
* Consumer group size gauge counters keyed by the metric name.
*/
- private final Map<ConsumerGroupState, TimelineGaugeCounter>
consumerGroupGauges;
+ private volatile Map<ConsumerGroupState, Long> consumerGroupGauges;
Review Comment:
Removed the timeline gauge counter because we recompute the metric from
scratch every 60 second, so the result will always be consistent despite any
rollbacks.
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