[ 
https://issues.apache.org/jira/browse/KAFKA-17000?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Andras Katona updated KAFKA-17000:
----------------------------------
    Description: 
h2. error during AclAuthorizer.configure
{noformat}
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /kafka-acl/DelegationToken
        at 
app//org.apache.zookeeper.KeeperException.create(KeeperException.java:134)
        at 
app//org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
        at 
app//kafka.zookeeper.AsyncResponse.maybeThrow(ZooKeeperClient.scala:570)
        at app//kafka.zk.KafkaZkClient.createRecursive(KafkaZkClient.scala:1883)
        at 
app//kafka.zk.KafkaZkClient.$anonfun$createAclPaths$2(KafkaZkClient.scala:1294)
        at 
app//kafka.zk.KafkaZkClient.$anonfun$createAclPaths$2$adapted(KafkaZkClient.scala:1294)
        at app//scala.collection.immutable.HashSet.foreach(HashSet.scala:958)
        at 
app//kafka.zk.KafkaZkClient.$anonfun$createAclPaths$1(KafkaZkClient.scala:1294)
        at 
app//kafka.zk.KafkaZkClient.$anonfun$createAclPaths$1$adapted(KafkaZkClient.scala:1292)
        at app//scala.collection.IterableOnceOps.foreach(IterableOnce.scala:576)
        at 
app//scala.collection.IterableOnceOps.foreach$(IterableOnce.scala:574)
        at app//scala.collection.AbstractIterable.foreach(Iterable.scala:933)
        at app//kafka.zk.KafkaZkClient.createAclPaths(KafkaZkClient.scala:1292)
        at 
app//kafka.security.authorizer.AclAuthorizer.configure(AclAuthorizer.scala:212)
        at 
app//kafka.security.authorizer.AuthorizerTest.createAclAuthorizer(AuthorizerTest.scala:1182)
        at 
app//kafka.security.authorizer.AuthorizerTest.createAuthorizer(AuthorizerTest.scala:1175)
        at 
app//kafka.security.authorizer.AuthorizerTest.setUp(AuthorizerTest.scala:95)
        at jdk.internal.reflect.GeneratedMethodAccessor138.invoke(Unknown 
Source)
        at 
java.base@11.0.15/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base@11.0.15/java.lang.reflect.Method.invoke(Method.java:566)
        at 
app//org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:728)
        at 
app//org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
        at 
app//org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
        at 
app//org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:156)
        at 
app//org.junit.jupiter.engine.extension.TimeoutExtension.interceptLifecycleMethod(TimeoutExtension.java:128)
        at 
app//org.junit.jupiter.engine.extension.TimeoutExtension.interceptBeforeEachMethod(TimeoutExtension.java:78)
        at 
app//org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103)
        at 
app//org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.lambda$invoke$0(InterceptingExecutableInvoker.java:93)
        at 
app//org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
        at 
app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
        at 
app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
        at 
app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
        at 
app//org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:92)
        at 
app//org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:86)
        at 
app//org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeMethodInExtensionContext(ClassBasedTestDescriptor.java:521)
        at 
app//org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$synthesizeBeforeEachMethodAdapter$23(ClassBasedTestDescriptor.java:506)
        at 
app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeBeforeEachMethods$3(TestMethodTestDescriptor.java:175)
        at 
app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeBeforeMethodsOrCallbacksUntilExceptionOccurs$6(TestMethodTestDescriptor.java:203)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeBeforeMethodsOrCallbacksUntilExceptionOccurs(TestMethodTestDescriptor.java:203)
        at 
app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeBeforeEachMethods(TestMethodTestDescriptor.java:172)
        at 
app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
        at 
app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:69)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
        at 
app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
        at 
app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask$DefaultDynamicTestExecutor.execute(NodeTestTask.java:226)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask$DefaultDynamicTestExecutor.execute(NodeTestTask.java:204)
        at 
app//org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:142)
        at 
app//org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.lambda$execute$2(TestTemplateTestDescriptor.java:110)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
        at 
java.base@11.0.15/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
        at 
app//org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:110)
        at 
app//org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:44)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
        at 
app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
        at java.base@11.0.15/java.util.ArrayList.forEach(ArrayList.java:1541)
        at 
app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
        at 
app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
        at java.base@11.0.15/java.util.ArrayList.forEach(ArrayList.java:1541)
        at 
app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
        at 
app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
        at 
app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
        at 
app//org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
        at 
app//org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)
        at 
app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:107)
        at 
app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
        at 
app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
        at 
app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
        at 
app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
        at 
app//org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114)
        at 
app//org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86)
        at 
app//org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86)
        at 
org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses(JUnitPlatformTestClassProcessor.java:119)
        at 
org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000(JUnitPlatformTestClassProcessor.java:94)
        at 
org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop(JUnitPlatformTestClassProcessor.java:89)
        at 
org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:62)
        at 
java.base@11.0.15/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
        at 
java.base@11.0.15/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
java.base@11.0.15/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base@11.0.15/java.lang.reflect.Method.invoke(Method.java:566)
        at 
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
        at 
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
        at 
org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
        at 
org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
        at com.sun.proxy.$Proxy2.stop(Unknown Source)
        at 
org.gradle.api.internal.tasks.testing.worker.TestWorker$3.run(TestWorker.java:193)
        at 
org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
        at 
org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
        at 
org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
        at 
org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
        at 
org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:113)
        at 
org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:65)
        at 
app//worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
        at 
app//worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)
        Suppressed: java.lang.NullPointerException
                at 
kafka.security.authorizer.AuthorizerTest.tearDown(AuthorizerTest.scala:116)
                at 
jdk.internal.reflect.GeneratedMethodAccessor139.invoke(Unknown Source)
                at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.base/java.lang.reflect.Method.invoke(Method.java:566)
                at 
org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:728)
                at 
org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
                at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
                at 
org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:156)
                at 
org.junit.jupiter.engine.extension.TimeoutExtension.interceptLifecycleMethod(TimeoutExtension.java:128)
                at 
org.junit.jupiter.engine.extension.TimeoutExtension.interceptAfterEachMethod(TimeoutExtension.java:110)
                at 
org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103)
                at 
org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.lambda$invoke$0(InterceptingExecutableInvoker.java:93)
                at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
                at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
                at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
                at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
                at 
org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:92)
                at 
org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:86)
                at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeMethodInExtensionContext(ClassBasedTestDescriptor.java:521)
                at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$synthesizeAfterEachMethodAdapter$24(ClassBasedTestDescriptor.java:511)
                at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeAfterEachMethods$10(TestMethodTestDescriptor.java:244)
                at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeAllAfterMethodsOrCallbacks$13(TestMethodTestDescriptor.java:277)
                at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
                at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeAllAfterMethodsOrCallbacks$14(TestMethodTestDescriptor.java:277)
                at 
org.junit.platform.commons.util.CollectionUtils.forEachInReverseOrder(CollectionUtils.java:217)
                at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeAllAfterMethodsOrCallbacks(TestMethodTestDescriptor.java:276)
                at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeAfterEachMethods(TestMethodTestDescriptor.java:242)
                at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:143)

{noformat}

h2. unexpected threads at afterAll, teardown
{noformat}
org.opentest4j.AssertionFailedError: Found 2 unexpected threads during 
@AfterAll: 
`zk-client-ZooKeeperTestHarness-reinit-0-EventThread,zk-client-ACLauthorizer-reinit-0-EventThread`
 ==> expected: <true> but was: <false>
        at 
app//org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
        at 
app//org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
        at app//org.junit.jupiter.api.AssertTrue.failNotTrue(AssertTrue.java:63)
        at app//org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:36)
        at app//org.junit.jupiter.api.Assertions.assertTrue(Assertions.java:210)
        at 
app//kafka.utils.TestUtils$.verifyNoUnexpectedThreads(TestUtils.scala:2460)
        at 
app//kafka.server.QuorumTestHarness.tearDownClass(QuorumTestHarness.scala:471)
...
{noformat}

  was:
h2. error
{noformat}
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /kafka-acl/DelegationToken
        at 
app//org.apache.zookeeper.KeeperException.create(KeeperException.java:134)
        at 
app//org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
        at 
app//kafka.zookeeper.AsyncResponse.maybeThrow(ZooKeeperClient.scala:570)
        at app//kafka.zk.KafkaZkClient.createRecursive(KafkaZkClient.scala:1883)
        at 
app//kafka.zk.KafkaZkClient.$anonfun$createAclPaths$2(KafkaZkClient.scala:1294)
        at 
app//kafka.zk.KafkaZkClient.$anonfun$createAclPaths$2$adapted(KafkaZkClient.scala:1294)
        at app//scala.collection.immutable.HashSet.foreach(HashSet.scala:958)
        at 
app//kafka.zk.KafkaZkClient.$anonfun$createAclPaths$1(KafkaZkClient.scala:1294)
        at 
app//kafka.zk.KafkaZkClient.$anonfun$createAclPaths$1$adapted(KafkaZkClient.scala:1292)
        at app//scala.collection.IterableOnceOps.foreach(IterableOnce.scala:576)
        at 
app//scala.collection.IterableOnceOps.foreach$(IterableOnce.scala:574)
        at app//scala.collection.AbstractIterable.foreach(Iterable.scala:933)
        at app//kafka.zk.KafkaZkClient.createAclPaths(KafkaZkClient.scala:1292)
        at 
app//kafka.security.authorizer.AclAuthorizer.configure(AclAuthorizer.scala:212)
        at 
app//kafka.security.authorizer.AuthorizerTest.createAclAuthorizer(AuthorizerTest.scala:1182)
        at 
app//kafka.security.authorizer.AuthorizerTest.createAuthorizer(AuthorizerTest.scala:1175)
        at 
app//kafka.security.authorizer.AuthorizerTest.setUp(AuthorizerTest.scala:95)
        at jdk.internal.reflect.GeneratedMethodAccessor138.invoke(Unknown 
Source)
        at 
java.base@11.0.15/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base@11.0.15/java.lang.reflect.Method.invoke(Method.java:566)
        at 
app//org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:728)
        at 
app//org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
        at 
app//org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
        at 
app//org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:156)
        at 
app//org.junit.jupiter.engine.extension.TimeoutExtension.interceptLifecycleMethod(TimeoutExtension.java:128)
        at 
app//org.junit.jupiter.engine.extension.TimeoutExtension.interceptBeforeEachMethod(TimeoutExtension.java:78)
        at 
app//org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103)
        at 
app//org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.lambda$invoke$0(InterceptingExecutableInvoker.java:93)
        at 
app//org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
        at 
app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
        at 
app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
        at 
app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
        at 
app//org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:92)
        at 
app//org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:86)
        at 
app//org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeMethodInExtensionContext(ClassBasedTestDescriptor.java:521)
        at 
app//org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$synthesizeBeforeEachMethodAdapter$23(ClassBasedTestDescriptor.java:506)
        at 
app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeBeforeEachMethods$3(TestMethodTestDescriptor.java:175)
        at 
app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeBeforeMethodsOrCallbacksUntilExceptionOccurs$6(TestMethodTestDescriptor.java:203)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeBeforeMethodsOrCallbacksUntilExceptionOccurs(TestMethodTestDescriptor.java:203)
        at 
app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeBeforeEachMethods(TestMethodTestDescriptor.java:172)
        at 
app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
        at 
app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:69)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
        at 
app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
        at 
app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask$DefaultDynamicTestExecutor.execute(NodeTestTask.java:226)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask$DefaultDynamicTestExecutor.execute(NodeTestTask.java:204)
        at 
app//org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:142)
        at 
app//org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.lambda$execute$2(TestTemplateTestDescriptor.java:110)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at 
java.base@11.0.15/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
        at 
java.base@11.0.15/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
        at 
java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
        at 
java.base@11.0.15/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at 
java.base@11.0.15/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
        at 
app//org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:110)
        at 
app//org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:44)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
        at 
app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
        at java.base@11.0.15/java.util.ArrayList.forEach(ArrayList.java:1541)
        at 
app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
        at 
app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
        at java.base@11.0.15/java.util.ArrayList.forEach(ArrayList.java:1541)
        at 
app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
        at 
app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
        at 
app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
        at 
app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
        at 
app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
        at 
app//org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
        at 
app//org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)
        at 
app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:107)
        at 
app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
        at 
app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
        at 
app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
        at 
app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
        at 
app//org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114)
        at 
app//org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86)
        at 
app//org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86)
        at 
org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses(JUnitPlatformTestClassProcessor.java:119)
        at 
org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000(JUnitPlatformTestClassProcessor.java:94)
        at 
org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop(JUnitPlatformTestClassProcessor.java:89)
        at 
org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:62)
        at 
java.base@11.0.15/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
        at 
java.base@11.0.15/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
java.base@11.0.15/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base@11.0.15/java.lang.reflect.Method.invoke(Method.java:566)
        at 
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
        at 
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
        at 
org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
        at 
org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
        at com.sun.proxy.$Proxy2.stop(Unknown Source)
        at 
org.gradle.api.internal.tasks.testing.worker.TestWorker$3.run(TestWorker.java:193)
        at 
org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
        at 
org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
        at 
org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
        at 
org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
        at 
org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:113)
        at 
org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:65)
        at 
app//worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
        at 
app//worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)
        Suppressed: java.lang.NullPointerException
                at 
kafka.security.authorizer.AuthorizerTest.tearDown(AuthorizerTest.scala:116)
                at 
jdk.internal.reflect.GeneratedMethodAccessor139.invoke(Unknown Source)
                at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.base/java.lang.reflect.Method.invoke(Method.java:566)
                at 
org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:728)
                at 
org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
                at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
                at 
org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:156)
                at 
org.junit.jupiter.engine.extension.TimeoutExtension.interceptLifecycleMethod(TimeoutExtension.java:128)
                at 
org.junit.jupiter.engine.extension.TimeoutExtension.interceptAfterEachMethod(TimeoutExtension.java:110)
                at 
org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103)
                at 
org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.lambda$invoke$0(InterceptingExecutableInvoker.java:93)
                at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
                at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
                at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
                at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
                at 
org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:92)
                at 
org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:86)
                at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeMethodInExtensionContext(ClassBasedTestDescriptor.java:521)
                at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$synthesizeAfterEachMethodAdapter$24(ClassBasedTestDescriptor.java:511)
                at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeAfterEachMethods$10(TestMethodTestDescriptor.java:244)
                at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeAllAfterMethodsOrCallbacks$13(TestMethodTestDescriptor.java:277)
                at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
                at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeAllAfterMethodsOrCallbacks$14(TestMethodTestDescriptor.java:277)
                at 
org.junit.platform.commons.util.CollectionUtils.forEachInReverseOrder(CollectionUtils.java:217)
                at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeAllAfterMethodsOrCallbacks(TestMethodTestDescriptor.java:276)
                at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeAfterEachMethods(TestMethodTestDescriptor.java:242)
                at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:143)

{noformat}

h2. after
{noformat}
org.opentest4j.AssertionFailedError: Found 2 unexpected threads during 
@AfterAll: 
`zk-client-ZooKeeperTestHarness-reinit-0-EventThread,zk-client-ACLauthorizer-reinit-0-EventThread`
 ==> expected: <true> but was: <false>
        at 
app//org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
        at 
app//org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
        at app//org.junit.jupiter.api.AssertTrue.failNotTrue(AssertTrue.java:63)
        at app//org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:36)
        at app//org.junit.jupiter.api.Assertions.assertTrue(Assertions.java:210)
        at 
app//kafka.utils.TestUtils$.verifyNoUnexpectedThreads(TestUtils.scala:2460)
        at 
app//kafka.server.QuorumTestHarness.tearDownClass(QuorumTestHarness.scala:471)
...
{noformat}


> Occasional AuthorizerTest thread leak
> -------------------------------------
>
>                 Key: KAFKA-17000
>                 URL: https://issues.apache.org/jira/browse/KAFKA-17000
>             Project: Kafka
>          Issue Type: Test
>            Reporter: Andras Katona
>            Assignee: Andras Katona
>            Priority: Major
>
> h2. error during AclAuthorizer.configure
> {noformat}
> org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode 
> = Session expired for /kafka-acl/DelegationToken
>       at 
> app//org.apache.zookeeper.KeeperException.create(KeeperException.java:134)
>       at 
> app//org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
>       at 
> app//kafka.zookeeper.AsyncResponse.maybeThrow(ZooKeeperClient.scala:570)
>       at app//kafka.zk.KafkaZkClient.createRecursive(KafkaZkClient.scala:1883)
>       at 
> app//kafka.zk.KafkaZkClient.$anonfun$createAclPaths$2(KafkaZkClient.scala:1294)
>       at 
> app//kafka.zk.KafkaZkClient.$anonfun$createAclPaths$2$adapted(KafkaZkClient.scala:1294)
>       at app//scala.collection.immutable.HashSet.foreach(HashSet.scala:958)
>       at 
> app//kafka.zk.KafkaZkClient.$anonfun$createAclPaths$1(KafkaZkClient.scala:1294)
>       at 
> app//kafka.zk.KafkaZkClient.$anonfun$createAclPaths$1$adapted(KafkaZkClient.scala:1292)
>       at app//scala.collection.IterableOnceOps.foreach(IterableOnce.scala:576)
>       at 
> app//scala.collection.IterableOnceOps.foreach$(IterableOnce.scala:574)
>       at app//scala.collection.AbstractIterable.foreach(Iterable.scala:933)
>       at app//kafka.zk.KafkaZkClient.createAclPaths(KafkaZkClient.scala:1292)
>       at 
> app//kafka.security.authorizer.AclAuthorizer.configure(AclAuthorizer.scala:212)
>       at 
> app//kafka.security.authorizer.AuthorizerTest.createAclAuthorizer(AuthorizerTest.scala:1182)
>       at 
> app//kafka.security.authorizer.AuthorizerTest.createAuthorizer(AuthorizerTest.scala:1175)
>       at 
> app//kafka.security.authorizer.AuthorizerTest.setUp(AuthorizerTest.scala:95)
>       at jdk.internal.reflect.GeneratedMethodAccessor138.invoke(Unknown 
> Source)
>       at 
> java.base@11.0.15/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.base@11.0.15/java.lang.reflect.Method.invoke(Method.java:566)
>       at 
> app//org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:728)
>       at 
> app//org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
>       at 
> app//org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
>       at 
> app//org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:156)
>       at 
> app//org.junit.jupiter.engine.extension.TimeoutExtension.interceptLifecycleMethod(TimeoutExtension.java:128)
>       at 
> app//org.junit.jupiter.engine.extension.TimeoutExtension.interceptBeforeEachMethod(TimeoutExtension.java:78)
>       at 
> app//org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103)
>       at 
> app//org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.lambda$invoke$0(InterceptingExecutableInvoker.java:93)
>       at 
> app//org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
>       at 
> app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
>       at 
> app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
>       at 
> app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
>       at 
> app//org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:92)
>       at 
> app//org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:86)
>       at 
> app//org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeMethodInExtensionContext(ClassBasedTestDescriptor.java:521)
>       at 
> app//org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$synthesizeBeforeEachMethodAdapter$23(ClassBasedTestDescriptor.java:506)
>       at 
> app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeBeforeEachMethods$3(TestMethodTestDescriptor.java:175)
>       at 
> app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeBeforeMethodsOrCallbacksUntilExceptionOccurs$6(TestMethodTestDescriptor.java:203)
>       at 
> app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeBeforeMethodsOrCallbacksUntilExceptionOccurs(TestMethodTestDescriptor.java:203)
>       at 
> app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeBeforeEachMethods(TestMethodTestDescriptor.java:172)
>       at 
> app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
>       at 
> app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:69)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
>       at 
> app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
>       at 
> app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
>       at 
> app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
>       at 
> app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask$DefaultDynamicTestExecutor.execute(NodeTestTask.java:226)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask$DefaultDynamicTestExecutor.execute(NodeTestTask.java:204)
>       at 
> app//org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:142)
>       at 
> app//org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.lambda$execute$2(TestTemplateTestDescriptor.java:110)
>       at 
> java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
>       at 
> java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
>       at 
> java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
>       at 
> java.base@11.0.15/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
>       at 
> java.base@11.0.15/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
>       at 
> java.base@11.0.15/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
>       at 
> java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
>       at 
> java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
>       at 
> java.base@11.0.15/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
>       at 
> java.base@11.0.15/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
>       at 
> java.base@11.0.15/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
>       at 
> java.base@11.0.15/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
>       at 
> java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
>       at 
> java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
>       at 
> java.base@11.0.15/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
>       at 
> java.base@11.0.15/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
>       at 
> java.base@11.0.15/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
>       at 
> java.base@11.0.15/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
>       at 
> java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
>       at 
> java.base@11.0.15/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
>       at 
> java.base@11.0.15/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
>       at 
> java.base@11.0.15/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
>       at 
> app//org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:110)
>       at 
> app//org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:44)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
>       at 
> app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
>       at 
> app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
>       at 
> app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
>       at java.base@11.0.15/java.util.ArrayList.forEach(ArrayList.java:1541)
>       at 
> app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
>       at 
> app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
>       at 
> app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
>       at 
> app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
>       at java.base@11.0.15/java.util.ArrayList.forEach(ArrayList.java:1541)
>       at 
> app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
>       at 
> app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
>       at 
> app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
>       at 
> app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
>       at 
> app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
>       at 
> app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
>       at 
> app//org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
>       at 
> app//org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)
>       at 
> app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:107)
>       at 
> app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
>       at 
> app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
>       at 
> app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
>       at 
> app//org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
>       at 
> app//org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114)
>       at 
> app//org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86)
>       at 
> app//org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86)
>       at 
> org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses(JUnitPlatformTestClassProcessor.java:119)
>       at 
> org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000(JUnitPlatformTestClassProcessor.java:94)
>       at 
> org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop(JUnitPlatformTestClassProcessor.java:89)
>       at 
> org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:62)
>       at 
> java.base@11.0.15/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
>  Method)
>       at 
> java.base@11.0.15/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> java.base@11.0.15/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.base@11.0.15/java.lang.reflect.Method.invoke(Method.java:566)
>       at 
> org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
>       at 
> org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
>       at 
> org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
>       at 
> org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
>       at com.sun.proxy.$Proxy2.stop(Unknown Source)
>       at 
> org.gradle.api.internal.tasks.testing.worker.TestWorker$3.run(TestWorker.java:193)
>       at 
> org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
>       at 
> org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
>       at 
> org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
>       at 
> org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
>       at 
> org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:113)
>       at 
> org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:65)
>       at 
> app//worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
>       at 
> app//worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)
>       Suppressed: java.lang.NullPointerException
>               at 
> kafka.security.authorizer.AuthorizerTest.tearDown(AuthorizerTest.scala:116)
>               at 
> jdk.internal.reflect.GeneratedMethodAccessor139.invoke(Unknown Source)
>               at 
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>               at java.base/java.lang.reflect.Method.invoke(Method.java:566)
>               at 
> org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:728)
>               at 
> org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
>               at 
> org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
>               at 
> org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:156)
>               at 
> org.junit.jupiter.engine.extension.TimeoutExtension.interceptLifecycleMethod(TimeoutExtension.java:128)
>               at 
> org.junit.jupiter.engine.extension.TimeoutExtension.interceptAfterEachMethod(TimeoutExtension.java:110)
>               at 
> org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103)
>               at 
> org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.lambda$invoke$0(InterceptingExecutableInvoker.java:93)
>               at 
> org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
>               at 
> org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
>               at 
> org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
>               at 
> org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
>               at 
> org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:92)
>               at 
> org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:86)
>               at 
> org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeMethodInExtensionContext(ClassBasedTestDescriptor.java:521)
>               at 
> org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$synthesizeAfterEachMethodAdapter$24(ClassBasedTestDescriptor.java:511)
>               at 
> org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeAfterEachMethods$10(TestMethodTestDescriptor.java:244)
>               at 
> org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeAllAfterMethodsOrCallbacks$13(TestMethodTestDescriptor.java:277)
>               at 
> org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>               at 
> org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeAllAfterMethodsOrCallbacks$14(TestMethodTestDescriptor.java:277)
>               at 
> org.junit.platform.commons.util.CollectionUtils.forEachInReverseOrder(CollectionUtils.java:217)
>               at 
> org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeAllAfterMethodsOrCallbacks(TestMethodTestDescriptor.java:276)
>               at 
> org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeAfterEachMethods(TestMethodTestDescriptor.java:242)
>               at 
> org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:143)
> {noformat}
> h2. unexpected threads at afterAll, teardown
> {noformat}
> org.opentest4j.AssertionFailedError: Found 2 unexpected threads during 
> @AfterAll: 
> `zk-client-ZooKeeperTestHarness-reinit-0-EventThread,zk-client-ACLauthorizer-reinit-0-EventThread`
>  ==> expected: <true> but was: <false>
>       at 
> app//org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
>       at 
> app//org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
>       at app//org.junit.jupiter.api.AssertTrue.failNotTrue(AssertTrue.java:63)
>       at app//org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:36)
>       at app//org.junit.jupiter.api.Assertions.assertTrue(Assertions.java:210)
>       at 
> app//kafka.utils.TestUtils$.verifyNoUnexpectedThreads(TestUtils.scala:2460)
>       at 
> app//kafka.server.QuorumTestHarness.tearDownClass(QuorumTestHarness.scala:471)
> ...
> {noformat}



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