Jason Gustafson created KAFKA-7604:
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Summary: 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
{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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