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https://issues.apache.org/jira/browse/KAFKA-13514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17469743#comment-17469743
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Luke Chen commented on KAFKA-13514:
-----------------------------------
[~ableegoldman] [~mjsax] , It looks like the assignor assigned the partition
"topic-0" to multiple consumers: consumer1 and consumer2. There should be a
rare case in general assignor that causes this issue. As we know that the
general assignor was complex and slow, I think it's a good chance to fix it.
I'll work on in in KAFKA-12676. Thank you.
> Flakey test StickyAssignorTest
> ------------------------------
>
> Key: KAFKA-13514
> URL: https://issues.apache.org/jira/browse/KAFKA-13514
> Project: Kafka
> Issue Type: Test
> Components: clients, unit tests
> Reporter: Matthias J. Sax
> Assignee: Luke Chen
> Priority: Critical
> Labels: flaky-test
>
> org.apache.kafka.clients.consumer.StickyAssignorTest.testLargeAssignmentAndGroupWithNonEqualSubscription()
> No real stack trace, but only:
> {quote}java.util.concurrent.TimeoutException:
> testLargeAssignmentAndGroupWithNonEqualSubscription() timed out after 60
> seconds{quote}
> STDOUT
> {quote}[2021-12-07 01:32:23,920] ERROR Found multiple consumers consumer1 and
> consumer2 claiming the same TopicPartition topic-0 in the same generation -1,
> this will be invalidated and removed from their previous assignment.
> (org.apache.kafka.clients.consumer.internals.AbstractStickyAssignor:150)
> [2021-12-07 01:32:58,964] ERROR Found multiple consumers consumer1 and
> consumer2 claiming the same TopicPartition topic-0 in the same generation -1,
> this will be invalidated and removed from their previous assignment.
> (org.apache.kafka.clients.consumer.internals.AbstractStickyAssignor:150)
> [2021-12-07 01:32:58,976] ERROR Found multiple consumers consumer1 and
> consumer2 claiming the same TopicPartition topic-0 in the same generation -1,
> this will be invalidated and removed from their previous assignment.
> (org.apache.kafka.clients.consumer.internals.AbstractStickyAssignor:150){quote}
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