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https://issues.apache.org/jira/browse/KAFKA-14014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17564158#comment-17564158
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Matthew de Detrich commented on KAFKA-14014:
--------------------------------------------
Okay so another update, I think my async theory doesn't hold up. After running
the above code over a few days it doesn't appear to be making a difference if
you account for the extra time that the test is taking due to the Thread.sleep
I did however notice something interesting, three are actually 2 types of stack
traces that you can get, the one mentioned in the ticket and this one
{code:java}
org.apache.kafka.streams.integration.NamedTopologyIntegrationTest >
shouldAllowRemovingAndAddingNamedTopologyToRunningApplicationWithMultipleNodesAndResetsOffsets
FAILED
java.lang.AssertionError:
Expected: <[KeyValue(B, 1), KeyValue(A, 2), KeyValue(C, 2)]>
but: was <[KeyValue(B, 1), KeyValue(A, 2), KeyValue(C, 1), KeyValue(C, 2)]>
at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)
at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:6)
at
org.apache.kafka.streams.integration.NamedTopologyIntegrationTest.shouldAllowRemovingAndAddingNamedTopologyToRunningApplicationWithMultipleNodesAndResetsOffsets(NamedTopologyIntegrationTest.java:544){code}
As you can see, in this case C appears to be counted twice, once with a value
1 and the other with a value 2. Due to this I have a suspicion that there may
be some issue with the underlying stream that only appears when under heavy
load?
> Flaky test
> NamedTopologyIntegrationTest.shouldAllowRemovingAndAddingNamedTopologyToRunningApplicationWithMultipleNodesAndResetsOffsets()
> ----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-14014
> URL: https://issues.apache.org/jira/browse/KAFKA-14014
> Project: Kafka
> Issue Type: Test
> Components: streams
> Reporter: Bruno Cadonna
> Priority: Critical
> Labels: flaky-test
>
> {code:java}
> java.lang.AssertionError:
> Expected: <[KeyValue(B, 1), KeyValue(A, 2), KeyValue(C, 2)]>
> but: was <[KeyValue(B, 1), KeyValue(A, 2), KeyValue(C, 1)]>
> at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)
> at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:6)
> at
> org.apache.kafka.streams.integration.NamedTopologyIntegrationTest.shouldAllowRemovingAndAddingNamedTopologyToRunningApplicationWithMultipleNodesAndResetsOffsets(NamedTopologyIntegrationTest.java:540)
> at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.lang.reflect.Method.invoke(Method.java:568)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> at
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
> at
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
> at
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
> at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
> at java.base/java.lang.Thread.run(Thread.java:833)
> {code}
> https://ci-builds.apache.org/job/Kafka/job/kafka-pr/job/PR-12310/2/testReport/junit/org.apache.kafka.streams.integration/NamedTopologyIntegrationTest/Build___JDK_11_and_Scala_2_13___shouldAllowRemovingAndAddingNamedTopologyToRunningApplicationWithMultipleNodesAndResetsOffsets/
> https://ci-builds.apache.org/job/Kafka/job/kafka-pr/job/PR-12310/2/testReport/junit/org.apache.kafka.streams.integration/NamedTopologyIntegrationTest/Build___JDK_17_and_Scala_2_13___shouldAllowRemovingAndAddingNamedTopologyToRunningApplicationWithMultipleNodesAndResetsOffsets/
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