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From "Ismael Juma (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (KAFKA-4528) Failure in kafka.producer.ProducerTest.testAsyncSendCanCorrectlyFailWithTimeout
Date Tue, 03 Jan 2017 10:50:59 GMT

     [ https://issues.apache.org/jira/browse/KAFKA-4528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ismael Juma updated KAFKA-4528:
-------------------------------
    Fix Version/s: 0.10.2.0

> Failure in kafka.producer.ProducerTest.testAsyncSendCanCorrectlyFailWithTimeout
> -------------------------------------------------------------------------------
>
>                 Key: KAFKA-4528
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4528
>             Project: Kafka
>          Issue Type: Sub-task
>          Components: unit tests
>            Reporter: Guozhang Wang
>            Assignee: Ismael Juma
>              Labels: newbie
>             Fix For: 0.10.2.0
>
>
> I have seen this failure a few times in the past few days, worth investigating.
> Example:
> https://builds.apache.org/job/kafka-pr-jdk8-scala2.12/79/testReport/junit/kafka.producer/ProducerTest/testAsyncSendCanCorrectlyFailWithTimeout/
> {code}
> Stacktrace
> java.lang.AssertionError: Message set should have 1 message
> 	at org.junit.Assert.fail(Assert.java:88)
> 	at org.junit.Assert.assertTrue(Assert.java:41)
> 	at kafka.producer.ProducerTest.testAsyncSendCanCorrectlyFailWithTimeout(ProducerTest.scala:313)
> 	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:50)
> 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> 	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.runLeaf(ParentRunner.java:325)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> 	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> 	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.runTestClass(JUnitTestClassExecuter.java:114)
> 	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:57)
> 	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:66)
> 	at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
> 	at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:498)
> 	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
> 	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
> 	at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
> 	at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
> 	at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
> 	at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:109)
> 	at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:498)
> 	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
> 	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
> 	at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:377)
> 	at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
> 	at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> 	at java.lang.Thread.run(Thread.java:745)
> Standard Output
> [2016-12-12 18:51:44,634] ERROR ZKShutdownHandler is not registered, so ZooKeeper server
won't take any action on ERROR or SHUTDOWN server state changes (org.apache.zookeeper.server.ZooKeeperServer:472)
> [2016-12-12 18:51:45,540] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:51:47,004] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:51:49,041] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:51:50,696] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:51:51,564] ERROR ZKShutdownHandler is not registered, so ZooKeeper server
won't take any action on ERROR or SHUTDOWN server state changes (org.apache.zookeeper.server.ZooKeeperServer:472)
> [2016-12-12 18:51:51,574] ERROR ZKShutdownHandler is not registered, so ZooKeeper server
won't take any action on ERROR or SHUTDOWN server state changes (org.apache.zookeeper.server.ZooKeeperServer:472)
> [2016-12-12 18:51:52,430] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:51:53,612] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:51:55,093] ERROR ZKShutdownHandler is not registered, so ZooKeeper server
won't take any action on ERROR or SHUTDOWN server state changes (org.apache.zookeeper.server.ZooKeeperServer:472)
> [2016-12-12 18:51:55,125] ERROR ZKShutdownHandler is not registered, so ZooKeeper server
won't take any action on ERROR or SHUTDOWN server state changes (org.apache.zookeeper.server.ZooKeeperServer:472)
> [2016-12-12 18:51:55,178] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:51:56,671] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:51:58,469] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:51:59,661] ERROR ZKShutdownHandler is not registered, so ZooKeeper server
won't take any action on ERROR or SHUTDOWN server state changes (org.apache.zookeeper.server.ZooKeeperServer:472)
> [2016-12-12 18:51:59,662] WARN caught end of stream exception (org.apache.zookeeper.server.NIOServerCnxn:357)
> EndOfStreamException: Unable to read additional data from client sessionid 0x158f46081750000,
likely client has closed socket
> 	at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228)
> 	at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:203)
> 	at java.lang.Thread.run(Thread.java:745)
> [2016-12-12 18:51:59,696] ERROR ZKShutdownHandler is not registered, so ZooKeeper server
won't take any action on ERROR or SHUTDOWN server state changes (org.apache.zookeeper.server.ZooKeeperServer:472)
> [2016-12-12 18:52:00,177] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:52:01,420] ERROR fetching topic metadata for topics [Set(new-topic)] from
broker [ArrayBuffer(BrokerEndPoint(1,localhost,81), BrokerEndPoint(0,localhost,80))] failed
(kafka.utils.CoreUtils$:108)
> kafka.common.KafkaException: fetching topic metadata for topics [Set(new-topic)] from
broker [ArrayBuffer(BrokerEndPoint(1,localhost,81), BrokerEndPoint(0,localhost,80))] failed
> 	at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:73)
> 	at kafka.producer.BrokerPartitionInfo.updateInfo(BrokerPartitionInfo.scala:83)
> 	at kafka.producer.async.DefaultEventHandler.$anonfun$handle$4(DefaultEventHandler.scala:75)
> 	at kafka.utils.CoreUtils$.swallow(CoreUtils.scala:79)
> 	at kafka.utils.Logging.swallowError(Logging.scala:108)
> 	at kafka.utils.Logging.swallowError$(Logging.scala:107)
> 	at kafka.utils.CoreUtils$.swallowError(CoreUtils.scala:49)
> 	at kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler.scala:75)
> 	at kafka.producer.Producer.send(Producer.scala:78)
> 	at kafka.producer.ProducerTest.testUpdateBrokerPartitionInfo(ProducerTest.scala:120)
> 	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:50)
> 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> 	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.runLeaf(ParentRunner.java:325)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> 	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> 	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.runTestClass(JUnitTestClassExecuter.java:114)
> 	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:57)
> 	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:66)
> 	at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
> 	at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:498)
> 	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
> 	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
> 	at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
> 	at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
> 	at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
> 	at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:109)
> 	at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:498)
> 	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
> 	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
> 	at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:377)
> 	at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
> 	at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> 	at java.lang.Thread.run(Thread.java:745)
> Caused by: java.nio.channels.ClosedChannelException
> 	at kafka.network.BlockingChannel.send(BlockingChannel.scala:110)
> 	at kafka.producer.SyncProducer.liftedTree1$1(SyncProducer.scala:80)
> 	at kafka.producer.SyncProducer.doSend(SyncProducer.scala:79)
> 	at kafka.producer.SyncProducer.send(SyncProducer.scala:124)
> 	at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:59)
> 	... 52 more
> [2016-12-12 18:52:01,440] ERROR Failed to collate messages by topic, partition due to:
fetching topic metadata for topics [Set(new-topic)] from broker [ArrayBuffer(BrokerEndPoint(1,localhost,81),
BrokerEndPoint(0,localhost,80))] failed (kafka.producer.async.DefaultEventHandler:99)
> [2016-12-12 18:52:02,165] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:52:02,441] ERROR fetching topic metadata for topics [Set(new-topic)] from
broker [ArrayBuffer(BrokerEndPoint(0,localhost,80), BrokerEndPoint(1,localhost,81))] failed
(kafka.utils.CoreUtils$:108)
> kafka.common.KafkaException: fetching topic metadata for topics [Set(new-topic)] from
broker [ArrayBuffer(BrokerEndPoint(0,localhost,80), BrokerEndPoint(1,localhost,81))] failed
> 	at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:73)
> 	at kafka.producer.BrokerPartitionInfo.updateInfo(BrokerPartitionInfo.scala:83)
> 	at kafka.producer.async.DefaultEventHandler.$anonfun$handle$6(DefaultEventHandler.scala:86)
> 	at kafka.utils.CoreUtils$.swallow(CoreUtils.scala:79)
> 	at kafka.utils.Logging.swallowError(Logging.scala:108)
> 	at kafka.utils.Logging.swallowError$(Logging.scala:107)
> 	at kafka.utils.CoreUtils$.swallowError(CoreUtils.scala:49)
> 	at kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler.scala:86)
> 	at kafka.producer.Producer.send(Producer.scala:78)
> 	at kafka.producer.ProducerTest.testUpdateBrokerPartitionInfo(ProducerTest.scala:120)
> 	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:50)
> 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> 	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.runLeaf(ParentRunner.java:325)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> 	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> 	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.runTestClass(JUnitTestClassExecuter.java:114)
> 	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:57)
> 	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:66)
> 	at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
> 	at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:498)
> 	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
> 	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
> 	at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
> 	at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
> 	at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
> 	at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:109)
> 	at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:498)
> 	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
> 	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
> 	at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:377)
> 	at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
> 	at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> 	at java.lang.Thread.run(Thread.java:745)
> Caused by: java.nio.channels.ClosedChannelException
> 	at kafka.network.BlockingChannel.send(BlockingChannel.scala:110)
> 	at kafka.producer.SyncProducer.liftedTree1$1(SyncProducer.scala:80)
> 	at kafka.producer.SyncProducer.doSend(SyncProducer.scala:79)
> 	at kafka.producer.SyncProducer.send(SyncProducer.scala:124)
> 	at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:59)
> 	... 52 more
> [2016-12-12 18:52:02,443] ERROR Failed to send requests for topics new-topic with correlation
ids in [0,2] (kafka.producer.async.DefaultEventHandler:99)
> [2016-12-12 18:52:03,364] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:52:04,712] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:52:06,063] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:52:06,381] ERROR ZKShutdownHandler is not registered, so ZooKeeper server
won't take any action on ERROR or SHUTDOWN server state changes (org.apache.zookeeper.server.ZooKeeperServer:472)
> [2016-12-12 18:52:06,387] ERROR ZKShutdownHandler is not registered, so ZooKeeper server
won't take any action on ERROR or SHUTDOWN server state changes (org.apache.zookeeper.server.ZooKeeperServer:472)
> [2016-12-12 18:52:07,413] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:52:08,667] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:52:10,151] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:52:11,430] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:52:12,403] ERROR Failed to send requests for topics new-topic with correlation
ids in [3,5] (kafka.producer.async.DefaultEventHandler:99)
> [2016-12-12 18:52:13,462] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:52:14,925] WARN Session 0x158f44731c60002 for server null, unexpected
error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn:1162)
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> 	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
> [2016-12-12 18:52:16,176] ERROR ZKShutdownHandler is not registered, so ZooKeeper server
won't take any action on ERROR or SHUTDOWN server state changes (org.apache.zookeeper.server.ZooKeeperServer:472)
> {code}



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