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https://issues.apache.org/jira/browse/KAFKA-7965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17042923#comment-17042923
]
Matthias J. Sax commented on KAFKA-7965:
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[https://builds.apache.org/job/kafka-pr-jdk11-scala2.13/4866/testReport/junit/kafka.api/ConsumerBounceTest/testRollingBrokerRestartsWithSmallerMaxGroupSizeConfigDisruptsBigGroup/]
org.scalatest.exceptions.TestFailedException: The remaining consumers in the
group could not fetch the expected records
STDOUT (excerpt):
{quote}[2020-02-22 09:29:01,489] ERROR [ReplicaFetcher replicaId=2, leaderId=1,
fetcherId=0] Error for partition __consumer_offsets-0 at offset 0
(kafka.server.ReplicaFetcherThread:76)
org.apache.kafka.common.errors.UnknownTopicOrPartitionException: This server
does not host this topic-partition.
[2020-02-22 09:29:01,700] ERROR [ReplicaFetcher replicaId=0, leaderId=1,
fetcherId=0] Error for partition topic-0 at offset 0
(kafka.server.ReplicaFetcherThread:76)
org.apache.kafka.common.errors.UnknownTopicOrPartitionException: This server
does not host this topic-partition.
[2020-02-22 09:30:02,661] ERROR [Consumer clientId=ConsumerTestConsumer,
groupId=fatal-exception-test] Attempt to join group failed due to fatal error:
The consumer group has reached its max size.
(org.apache.kafka.clients.consumer.internals.AbstractCoordinator:627)
[2020-02-22 09:30:02,662] ERROR [daemon-consumer-assignment]: Error due to
(kafka.api.AbstractConsumerTest$ConsumerAssignmentPoller:76)
org.apache.kafka.common.errors.GroupMaxSizeReachedException: Consumer group
fatal-exception-test already has the configured maximum number of
members.{quote}
> Flaky Test
> ConsumerBounceTest#testRollingBrokerRestartsWithSmallerMaxGroupSizeConfigDisruptsBigGroup
> ----------------------------------------------------------------------------------------------------
>
> Key: KAFKA-7965
> URL: https://issues.apache.org/jira/browse/KAFKA-7965
> Project: Kafka
> Issue Type: Bug
> Components: clients, consumer, unit tests
> Affects Versions: 1.1.1, 2.2.0, 2.3.0
> Reporter: Matthias J. Sax
> Priority: Critical
> Labels: flaky-test
> Fix For: 2.3.0
>
>
> To get stable nightly builds for `2.2` release, I create tickets for all
> observed test failures.
> [https://jenkins.confluent.io/job/apache-kafka-test/job/2.2/21/]
> {quote}java.lang.AssertionError: Received 0, expected at least 68 at
> org.junit.Assert.fail(Assert.java:88) at
> org.junit.Assert.assertTrue(Assert.java:41) at
> kafka.api.ConsumerBounceTest.receiveAndCommit(ConsumerBounceTest.scala:557)
> at
> kafka.api.ConsumerBounceTest.$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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