Yunyung commented on code in PR #20152:
URL: https://github.com/apache/kafka/pull/20152#discussion_r2202317949
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clients/src/main/java/org/apache/kafka/clients/consumer/internals/AbstractCoordinator.java:
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@@ -1407,7 +1408,8 @@ public GroupCoordinatorMetrics(Metrics metrics, String
metricGrpPrefix) {
this.metricGrpName,
"The number of successful rebalance events per hour, each
event is composed of " +
"several failed re-trials until it succeeded"),
- new Rate(TimeUnit.HOURS, new WindowedCount())
+ new Rate(TimeUnit.HOURS, new WindowedCount()),
+ new MetricConfig().timeWindow(1, TimeUnit.HOURS)
Review Comment:
Sorry, looks like you replied just after I deleted my earlier comment. I’ve
rethought the approach.
The current patch feels more like a workaround.
Instead, we should probably create a variable:
`timeWindowMs = Math.max(unit.toMillis(1), config.timeWindowMs())` in `Rate`
to determine window length, and then pass this `timeWindowMs` to SampledStat
rather than using `config.timeWindowMs()` directly. Additionally, I think other
`MeasurableStat` that use `config.timeWindowMs()` besides `Rate` might have the
same issue.
Let’s see if there is agreement or any other ideas.
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