lucasbru commented on code in PR #18809:
URL: https://github.com/apache/kafka/pull/18809#discussion_r1958380749
##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/metrics/GroupCoordinatorMetricsShard.java:
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@@ -82,7 +82,7 @@ public TimelineGaugeCounter(TimelineLong timelineLong,
AtomicLong atomicLong) {
/**
* Streams group size gauge counters keyed by the metric name.
*/
- private final Map<StreamsGroupState, TimelineGaugeCounter>
streamsGroupGauges;
+ private volatile Map<StreamsGroupState, Long> streamsGroupGauges;
Review Comment:
I was mostly following a change from the consumer groups here, but indeed it
looks more lightweight
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