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https://issues.apache.org/jira/browse/KAFKA-7965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16821626#comment-16821626
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ASF GitHub Bot commented on KAFKA-7965:
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hachikuji commented on pull request #6608: KAFKA-7965; Fix flaky test
ConsumerBounceTest
URL: https://github.com/apache/kafka/pull/6608
We suspect the problem might be a race condition after broker startup where
the consumer has yet to find the coordinator and rebalance. The fix here rolls
all the brokers first and then waits for the expected exception.
### Committer Checklist (excluded from commit message)
- [ ] Verify design and implementation
- [ ] Verify test coverage and CI build status
- [ ] Verify documentation (including upgrade notes)
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> Flaky Test
> ConsumerBounceTest#testRollingBrokerRestartsWithSmallerMaxGroupSizeConfigDisruptsBigGroup
> ----------------------------------------------------------------------------------------------------
>
> Key: KAFKA-7965
> URL: https://issues.apache.org/jira/browse/KAFKA-7965
> Project: Kafka
> Issue Type: Bug
> Components: clients, consumer, unit tests
> Affects Versions: 1.1.1, 2.2.0, 2.3.0
> Reporter: Matthias J. Sax
> Assignee: Jason Gustafson
> Priority: Critical
> Labels: flaky-test
> Fix For: 2.3.0
>
>
> To get stable nightly builds for `2.2` release, I create tickets for all
> observed test failures.
> [https://jenkins.confluent.io/job/apache-kafka-test/job/2.2/21/]
> {quote}java.lang.AssertionError: Received 0, expected at least 68 at
> org.junit.Assert.fail(Assert.java:88) at
> org.junit.Assert.assertTrue(Assert.java:41) at
> kafka.api.ConsumerBounceTest.receiveAndCommit(ConsumerBounceTest.scala:557)
> at
> kafka.api.ConsumerBounceTest.$anonfun$testRollingBrokerRestartsWithSmallerMaxGroupSizeConfigDisruptsBigGroup$1(ConsumerBounceTest.scala:320)
> at
> kafka.api.ConsumerBounceTest.$anonfun$testRollingBrokerRestartsWithSmallerMaxGroupSizeConfigDisruptsBigGroup$1$adapted(ConsumerBounceTest.scala:319)
> at scala.collection.mutable.ResizableArray.foreach(ResizableArray.scala:62)
> at scala.collection.mutable.ResizableArray.foreach$(ResizableArray.scala:55)
> at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:49) at
> kafka.api.ConsumerBounceTest.testRollingBrokerRestartsWithSmallerMaxGroupSizeConfigDisruptsBigGroup(ConsumerBounceTest.scala:319){quote}
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