[ 
https://issues.apache.org/jira/browse/KAFKA-9750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17066909#comment-17066909
 ] 

Jose Armando Garcia Sancio commented on KAFKA-9750:
---------------------------------------------------

We are fairely consistently getting this failure.


Error Message
```
org.scalatest.exceptions.TestFailedException: the partition=test-topic-0 should 
be removed from pending state
```
Stacktrace
```
org.scalatest.exceptions.TestFailedException: the partition=test-topic-0 should 
be removed from pending state
        at 
org.scalatest.Assertions.newAssertionFailedException(Assertions.scala:530)
        at 
org.scalatest.Assertions.newAssertionFailedException$(Assertions.scala:529)
        at 
org.scalatest.Assertions$.newAssertionFailedException(Assertions.scala:1389)
        at org.scalatest.Assertions.fail(Assertions.scala:1091)
        at org.scalatest.Assertions.fail$(Assertions.scala:1087)
        at org.scalatest.Assertions$.fail(Assertions.scala:1389)
        at 
kafka.server.ReplicaManagerTest.testFencedErrorCausedByBecomeLeader(ReplicaManagerTest.scala:248)
        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)
        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.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
        at 
org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
        at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
        at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
        at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
        at 
org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:110)
        at 
org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
        at 
org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
        at 
org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62)
        at 
org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
        at sun.reflect.GeneratedMethodAccessor112.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
        at 
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
        at 
org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
        at 
org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
        at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
        at 
org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:118)
        at sun.reflect.GeneratedMethodAccessor111.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
        at 
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
        at 
org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182)
        at 
org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164)
        at 
org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:412)
        at 
org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
        at 
org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at 
org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
        at java.lang.Thread.run(Thread.java:748)
```
Standard Output
```
[2020-03-24 17:39:19,377] ERROR [ReplicaAlterLogDirsThread-0]: Error due to 
(kafka.server.ReplicaAlterLogDirsThread:76)
org.apache.kafka.common.errors.ReplicaNotAvailableException: Future log for 
partition test-topic-0 is not available on broker 0
[2020-03-24 17:39:38,537] ERROR [ReplicaManager broker=0] Error processing 
append operation on partition test-topic-0 (kafka.server.ReplicaManager:76)
org.apache.kafka.common.errors.OutOfOrderSequenceException: Out of order 
sequence number for producerId 234 at offset 3 in partition test-topic-0: 13 
(incoming seq. number), 2 (current end sequence number)
```

> Flaky test kafka.server.ReplicaManagerTest.testFencedErrorCausedByBecomeLeader
> ------------------------------------------------------------------------------
>
>                 Key: KAFKA-9750
>                 URL: https://issues.apache.org/jira/browse/KAFKA-9750
>             Project: Kafka
>          Issue Type: Bug
>          Components: core
>            Reporter: Bob Barrett
>            Assignee: Chia-Ping Tsai
>            Priority: Major
>              Labels: flaky-test
>
> When running tests locally, I've seen that 1-2% of the time, 
> testFencedErrorCausedByBecomeLeader fails with
> {code:java}
> org.scalatest.exceptions.TestFailedException: the partition=test-topic-0 
> should be removed from pending 
> stateorg.scalatest.exceptions.TestFailedException: the partition=test-topic-0 
> should be removed from pending state
>  at 
> org.scalatest.Assertions.newAssertionFailedException(Assertions.scala:530) at 
> org.scalatest.Assertions.newAssertionFailedException$(Assertions.scala:529) 
> at 
> org.scalatest.Assertions$.newAssertionFailedException(Assertions.scala:1389) 
> at org.scalatest.Assertions.fail(Assertions.scala:1091) at 
> org.scalatest.Assertions.fail$(Assertions.scala:1087) at 
> org.scalatest.Assertions$.fail(Assertions.scala:1389) at 
> kafka.server.ReplicaManagerTest.testFencedErrorCausedByBecomeLeader(ReplicaManagerTest.scala:248)
>  at jdk.internal.reflect.GeneratedMethodAccessor25.invoke(Unknown Source) at 
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>  at java.base/java.lang.reflect.Method.invoke(Method.java:566) 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.runners.ParentRunner$3.evaluate(ParentRunner.java:306) at 
> org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
>  at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366) at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
>  at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
>  at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331) at 
> org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79) at 
> org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329) at 
> org.junit.runners.ParentRunner.access$100(ParentRunner.java:66) at 
> org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293) at 
> org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306) at 
> org.junit.runners.ParentRunner.run(ParentRunner.java:413) at 
> org.junit.runner.JUnitCore.run(JUnitCore.java:137) at 
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
>  at 
> com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:40)
>  at 
> com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
>  at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58) {code}



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