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https://issues.apache.org/jira/browse/KAFKA-16019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17818983#comment-17818983
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Kirk True commented on KAFKA-16019:
-----------------------------------
{{testPerPartitionLeadMetricsCleanUpWithSubscribe}} is now passing
consistently, so marking this as fixed.
> Some of the tests in PlaintextConsumer can't seem to deterministically invoke
> and verify the consumer callback
> --------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-16019
> URL: https://issues.apache.org/jira/browse/KAFKA-16019
> Project: Kafka
> Issue Type: Test
> Components: clients, consumer
> Reporter: Philip Nee
> Assignee: Kirk True
> Priority: Critical
> Labels: consumer-threading-refactor, integration-tests, timeout
> Fix For: 3.8.0
>
>
> I was running the PlaintextConsumer to test the async consumer; however, a
> few tests were failing with not being able to verify the listener is invoked
> correctly
> For example `testPerPartitionLeadMetricsCleanUpWithSubscribe`
> Around 50% of the time, the listener's callsToAssigned was never incremented
> correctly. Event changing it to awaitUntilTrue it was still the same case
> {code:java}
> consumer.subscribe(List(topic, topic2).asJava, listener)
> val records = awaitNonEmptyRecords(consumer, tp)
> assertEquals(1, listener.callsToAssigned, "should be assigned once") {code}
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