Philip Nee created KAFKA-16019:
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Summary: Some of the tests in PlaintextConsumer can't seem to
deterministically invokes and verify the consumer callback
Key: KAFKA-16019
URL: https://issues.apache.org/jira/browse/KAFKA-16019
Project: Kafka
Issue Type: Task
Reporter: Philip Nee
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
consumer.subscribe(List(topic, topic2).asJava, listener)
val records = awaitNonEmptyRecords(consumer, tp)
assertEquals(1, listener.callsToAssigned, "should be assigned once")
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