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https://issues.apache.org/jira/browse/KAFKA-19091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17947825#comment-17947825
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Uladzislau Blok commented on KAFKA-19091:
-----------------------------------------
[~yangpoan] Hello, sorry for bothering you. There is a PR with fix. Could you
please review it, when you have time?
> Flaky test DelayedFutureTest#testDelayedFuture
> ----------------------------------------------
>
> Key: KAFKA-19091
> URL: https://issues.apache.org/jira/browse/KAFKA-19091
> Project: Kafka
> Issue Type: Test
> Reporter: PoAn Yang
> Assignee: Uladzislau Blok
> Priority: Minor
>
> The test case is flaky in 3% pipeline recently.
>
> The root case is race condition between worker thread (thread which is
> executing the test) and executor-testDelayedFuture (thread which should
> execute callback).
> -Natural fix would be to use CountDownlLatch with timeout to wait until
> executor-testDelayedFuture will be done with callback, or max waiting time
> will be reached.-
> To fix it we can use TestUtils#waitForCondition
>
> Error example:
> {noformat}
> org.opentest4j.AssertionFailedError: expected: <40> but was: <-1>
> at
> org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
> at
> org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
> at org.junit.jupiter.api.AssertEquals.failNotEqual(AssertEquals.java:197)
> 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:531)
> at
> integration.kafka.server.DelayedFutureTest.testDelayedFuture(DelayedFutureTest.scala:91)at
> java.lang.reflect.Method.invoke(Method.java:580)
> at java.util.ArrayList.forEach(ArrayList.java:1597)
> at java.util.ArrayList.forEach(ArrayList.java:1597){noformat}
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