[jira] [Resolved] (KAFKA-7604) Flaky Test `ConsumerCoordinatorTest.testRebalanceAfterTopicUnavailableWithPatternSubscribe`

["Vahid Hashemian (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-7604?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vahid Hashemian resolved KAFKA-7604.
------------------------------------
    Resolution: Fixed

> Flaky Test `ConsumerCoordinatorTest.testRebalanceAfterTopicUnavailableWithPatternSubscribe`
> -------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-7604
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7604
>             Project: Kafka
>          Issue Type: Bug
>          Components: unit tests
>            Reporter: Jason Gustafson
>            Assignee: Jason Gustafson
>            Priority: Major
>
> {code}
> java.lang.AssertionError: Metadata refresh requested unnecessarily
> 	at org.junit.Assert.fail(Assert.java:88)
> 	at org.junit.Assert.assertTrue(Assert.java:41)
> 	at org.junit.Assert.assertFalse(Assert.java:64)
> 	at org.apache.kafka.clients.consumer.internals.ConsumerCoordinatorTest.unavailableTopicTest(ConsumerCoordinatorTest.java:1034)
> 	at org.apache.kafka.clients.consumer.internals.ConsumerCoordinatorTest.testRebalanceAfterTopicUnavailableWithPatternSubscribe(ConsumerCoordinatorTest.java:984)
> {code}
> The problem seems to be a race condition in the test case with the heartbeat thread and the foreground thread unsafely attempting to update metadata at the same time.



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