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https://issues.apache.org/jira/browse/KAFKA-7266?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismael Juma resolved KAFKA-7266.
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Resolution: Fixed
Fix Version/s: 2.1.0
> Fix MetricsTest test flakiness
> ------------------------------
>
> Key: KAFKA-7266
> URL: https://issues.apache.org/jira/browse/KAFKA-7266
> Project: Kafka
> Issue Type: Improvement
> Reporter: Stanislav Kozlovski
> Assignee: Stanislav Kozlovski
> Priority: Minor
> Fix For: 2.1.0, 2.2.0
>
>
> The test `kafka.api.MetricsTest.testMetrics` has been failing intermittently
> in kafka builds (recent proof:
> https://github.com/apache/kafka/pull/5436#issuecomment-409683955)
> The particular failure is in the `MessageConversionsTimeMs` metric assertion -
> {code}
> java.lang.AssertionError: Message conversion time not recorded 0.0
> {code}
> There has been work done previously
> (https://github.com/apache/kafka/pull/4681) to combat the flakiness of the
> test and while it has improved it, the test still fails sometimes.
> h3. Solution
> On my machine, the test failed 5 times out of 25 runs. Increasing the record
> size and using compression should slow down message conversion enough to have
> it be above 1ms. Locally this test has not failed in 200 runs and counting
> with those changes
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