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https://issues.apache.org/jira/browse/KAFKA-13583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17480165#comment-17480165
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Kvicii.Yu commented on KAFKA-13583:
-----------------------------------
[~dajac] hi, I followed your advice and tried less polling time, reproduced
this issue.
> Fix FetchRequestBetweenDifferentIbpTest flaky tests
> ---------------------------------------------------
>
> Key: KAFKA-13583
> URL: https://issues.apache.org/jira/browse/KAFKA-13583
> Project: Kafka
> Issue Type: Improvement
> Reporter: David Jacot
> Priority: Minor
>
> FetchRequestBetweenDifferentIbpTest's tests often fails with:
> {noformat}
> org.opentest4j.AssertionFailedError: expected: <2> but was: <1>
> at org.junit.jupiter.api.AssertionUtils.fail(AssertionUtils.java:55)
> at org.junit.jupiter.api.AssertionUtils.failNotEqual(AssertionUtils.java:62)
> at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:150)
> at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:145)
> at org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:510)
> at
> integration.kafka.server.FetchRequestBetweenDifferentIbpTest.testControllerSwitchingIBP(FetchRequestBetweenDifferentIbpTest.scala:113)
> at
> integration.kafka.server.FetchRequestBetweenDifferentIbpTest.testControllerOldToNewIBP(FetchRequestBetweenDifferentIbpTest.scala:87)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> {noformat}
> This might be due to
> [https://github.com/apache/kafka/commit/e8818e234a879d5ca45accba0121f43f45381f4a]
> where we reduced the poll timeout.
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