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https://issues.apache.org/jira/browse/KAFKA-13911?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Divij Vaidya updated KAFKA-13911:
---------------------------------
Fix Version/s: 3.3.0
> Rate is calculated as NaN for minimum config values
> ---------------------------------------------------
>
> Key: KAFKA-13911
> URL: https://issues.apache.org/jira/browse/KAFKA-13911
> Project: Kafka
> Issue Type: Bug
> Reporter: Divij Vaidya
> Assignee: Divij Vaidya
> Priority: Minor
> Fix For: 3.3.0
>
>
> Implementation of connection creation rate quotas in Kafka is dependent on
> two configurations:
> #
> [quota.window.num|https://kafka.apache.org/documentation.html#brokerconfigs_quota.window.num]
> #
> [quota.window.size.seconds|https://kafka.apache.org/documentation.html#brokerconfigs_quota.window.size.seconds]
> The minimum possible values of these configuration is 1 as per the
> documentation. However, 1 as a minimum value for quota.window.num is invalid
> and leads to failure for calculation of rate as demonstrated below.
> As a proof of the bug, the following unit test fails:
> {code:java}
> @Test
> public void testUseWithMinimumPossibleConfiguration() {
> final Rate r = new Rate();
> MetricConfig config = new MetricConfig().samples(1).timeWindow(1,
> TimeUnit.SECONDS);
> Time elapsed = new MockTime();
> r.record(config, 1.0, elapsed.milliseconds());
> elapsed.sleep(100);
> r.record(config, 1.0, elapsed.milliseconds());
> elapsed.sleep(1000);
> final Double observedRate = r.measure(config, elapsed.milliseconds());
> assertFalse(Double.isNaN(observedRate));
> } {code}
>
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