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https://issues.apache.org/jira/browse/KAFKA-8748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16903574#comment-16903574
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ASF GitHub Bot commented on KAFKA-8748:
---------------------------------------
ijuma commented on pull request #7182: KAFKA-8748: Fix flaky
DescribeLogDirsRequestTest#testDescribeLogDirsRequest
URL: https://github.com/apache/kafka/pull/7182
The introduction of KIP-480: Sticky Producer Partitioner had the
side effect that `generateAndProduceMessages` can often write
messages to a lower number of partitions to improve batching.
`testDescribeLogDirsRequest` (and potentially other tests) relies
on the messages being written somewhat uniformly to the topic
partitions. We fix the issue by including a monotonically
increasing key in the produced messages.
### 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 DescribeLogDirsRequestTest#testDescribeLogDirsRequest
> ----------------------------------------------------------------
>
> Key: KAFKA-8748
> URL: https://issues.apache.org/jira/browse/KAFKA-8748
> Project: Kafka
> Issue Type: Bug
> Components: core, unit tests
> Affects Versions: 2.4.0
> Reporter: Matthias J. Sax
> Assignee: Ismael Juma
> Priority: Critical
> Labels: flaky-test
>
> [https://builds.apache.org/job/kafka-pr-jdk11-scala2.12/6704/testReport/junit/kafka.server/DescribeLogDirsRequestTest/testDescribeLogDirsRequest/]
> {quote}java.lang.AssertionError at org.junit.Assert.fail(Assert.java:87) at
> org.junit.Assert.assertTrue(Assert.java:42) at
> org.junit.Assert.assertTrue(Assert.java:53) at
> kafka.server.DescribeLogDirsRequestTest.testDescribeLogDirsRequest(DescribeLogDirsRequestTest.scala:60){quote}
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