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https://issues.apache.org/jira/browse/KAFKA-18537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17948961#comment-17948961
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Chia-Ping Tsai commented on KAFKA-18537:
----------------------------------------
It should be test by TestUtils.waitForCondition as `getAllStackTraces` is a
snapshot of threads. Hence, it may return out-of-date results.
> Fix flaky RemoteIndexCacheTest#testCleanerThreadShutdown
> --------------------------------------------------------
>
> Key: KAFKA-18537
> URL: https://issues.apache.org/jira/browse/KAFKA-18537
> Project: Kafka
> Issue Type: Bug
> Reporter: PoAn Yang
> Priority: Major
>
> This case failed 13 times in last month. Most of failure message is like
> following:
> {noformat}
> org.opentest4j.AssertionFailedError: Found unexpected 1
> threads=remote-log-index-cleaner ==> expected: <true> but was: <false>
> 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.AssertTrue.failNotTrue(AssertTrue.java:63)
> at org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:36)
> at org.junit.jupiter.api.Assertions.assertTrue(Assertions.java:214)
> at
> kafka.log.remote.RemoteIndexCacheTest.testCleanerThreadShutdown(RemoteIndexCacheTest.scala:333){noformat}
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