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https://issues.apache.org/jira/browse/KAFKA-7965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16775800#comment-16775800
 ] 

Matthias J. Sax commented on KAFKA-7965:
----------------------------------------

This just failed locally for me. Thus I guess there is fair chance to reproduce 
locally.
{quote}kafka.api.ConsumerBounceTest > 
testRollingBrokerRestartsWithSmallerMaxGroupSizeConfigDisruptsBigGroup FAILED
 java.lang.AssertionError: Received 0, expected at least 68
 at org.junit.Assert.fail(Assert.java:89)
 at org.junit.Assert.assertTrue(Assert.java:42)
 at 
kafka.api.ConsumerBounceTest.kafka$api$ConsumerBounceTest$$receiveAndCommit(ConsumerBounceTest.scala:562)
 at 
kafka.api.ConsumerBounceTest$$anonfun$testRollingBrokerRestartsWithSmallerMaxGroupSizeConfigDisruptsBigGroup$2.apply(ConsumerBounceTest.scala:325)
 at 
kafka.api.ConsumerBounceTest$$anonfun$testRollingBrokerRestartsWithSmallerMaxGroupSizeConfigDisruptsBigGroup$2.apply(ConsumerBounceTest.scala:324)
 at 
scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
 at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
 at 
kafka.api.ConsumerBounceTest.testRollingBrokerRestartsWithSmallerMaxGroupSizeConfigDisruptsBigGroup(ConsumerBounceTest.scala:324)
{quote}

> 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: 2.2.0
>            Reporter: Matthias J. Sax
>            Assignee: Stanislav Kozlovski
>            Priority: Critical
>             Fix For: 2.2.0
>
>
> 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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