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Posted to dev@kafka.apache.org by "Drausin Wulsin (JIRA)" <ji...@apache.org> on 2016/03/13 18:16:33 UTC
[jira] [Updated] (KAFKA-3392) ConsumerRecords iterator throws
NoSuchElementException when a TopicPartition is empty
[ https://issues.apache.org/jira/browse/KAFKA-3392?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Drausin Wulsin updated KAFKA-3392:
----------------------------------
Reviewer: Jay Kreps
Status: Patch Available (was: Open)
> ConsumerRecords iterator throws NoSuchElementException when a TopicPartition is empty
> -------------------------------------------------------------------------------------
>
> Key: KAFKA-3392
> URL: https://issues.apache.org/jira/browse/KAFKA-3392
> Project: Kafka
> Issue Type: Bug
> Components: clients, consumer
> Affects Versions: 0.9.0.1, 0.9.0.0
> Reporter: Drausin Wulsin
> Assignee: Neha Narkhede
> Labels: newbie
> Fix For: 0.10.0.0
>
>
> The [makeNext|https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/clients/consumer/ConsumerRecords.java#L103] method in the private static ConcatenatedIterable class of ConsumerRecords assumes that each TopicPartition is non-empty. When this is not the case we get a NoSuchElementException when getting the next element (see the [ConsumerRecordsTest|https://github.com/drausin/kafka/blob/bugfix/consumer-records-iterator/clients/src/test/java/org/apache/kafka/clients/consumer/ConsumerRecordsTest.java] class I created):
> {noformat}
> java.util.NoSuchElementException
> at java.util.ArrayList$Itr.next(ArrayList.java:854)
> at org.apache.kafka.clients.consumer.ConsumerRecords$ConcatenatedIterable$1.makeNext(ConsumerRecords.java:110)
> at org.apache.kafka.clients.consumer.ConsumerRecords$ConcatenatedIterable$1.makeNext(ConsumerRecords.java:99)
> at org.apache.kafka.common.utils.AbstractIterator.maybeComputeNext(AbstractIterator.java:79)
> at org.apache.kafka.common.utils.AbstractIterator.hasNext(AbstractIterator.java:45)
> at org.apache.kafka.clients.consumer.ConsumerRecordsTest.iterator(ConsumerRecordsTest.java:53)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:497)
> at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:68)
> at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:310)
> at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:89)
> at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:97)
> at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294)
> at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:127)
> at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
> at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282)
> at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:87)
> at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:50)
> at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207)
> at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)
> at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120)
> at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
> at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
> at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:122)
> at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:106)
> at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
> at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:119)
> at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
> at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
> at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)
> 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:497)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
> {noformat}
> I'm pretty new to Kafka, so there may be some context I'm missing here, but this seems like a pretty straightforward bug to me.
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