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https://issues.apache.org/jira/browse/KAFKA-2933?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Gustafson resolved KAFKA-2933.
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Resolution: Cannot Reproduce
It's been a long time since we've seen this, so I will close. We can reopen if
it reoccurs.
> Failure in kafka.api.PlaintextConsumerTest.testMultiConsumerDefaultAssignment
> -----------------------------------------------------------------------------
>
> Key: KAFKA-2933
> URL: https://issues.apache.org/jira/browse/KAFKA-2933
> Project: Kafka
> Issue Type: Sub-task
> Affects Versions: 0.10.0.0
> Reporter: Guozhang Wang
> Assignee: Jason Gustafson
> Priority: Major
> Labels: transient-unit-test-failure
>
> {code}
> kafka.api.PlaintextConsumerTest > testMultiConsumerDefaultAssignment FAILED
> java.lang.AssertionError: Did not get valid assignment for partitions
> [topic1-2, topic2-0, topic1-4, topic-1, topic-0, topic2-1, topic1-0,
> topic1-3, topic1-1, topic2-2] after we changed subscription
> at org.junit.Assert.fail(Assert.java:88)
> at kafka.utils.TestUtils$.waitUntilTrue(TestUtils.scala:747)
> at
> kafka.api.PlaintextConsumerTest.validateGroupAssignment(PlaintextConsumerTest.scala:644)
> at
> kafka.api.PlaintextConsumerTest.changeConsumerGroupSubscriptionAndValidateAssignment(PlaintextConsumerTest.scala:663)
> at
> kafka.api.PlaintextConsumerTest.testMultiConsumerDefaultAssignment(PlaintextConsumerTest.scala:461)
> java.util.ConcurrentModificationException: KafkaConsumer is not safe for
> multi-threaded access
> {code}
> Example: https://builds.apache.org/job/kafka-trunk-git-pr-jdk7/1582/console
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