Kafkameter NoClassDefFoundError

我正在通过jMeter plugin manager安装的jMeter extension向卡夫卡用户发送动态生成的消息来加载卡夫卡测试。Kafkameter NoClassDefFoundError

我的卡夫卡配置，设置和运行完美。我跟着these instructions设立卡夫卡测试计划和运行它，但每次我设置一个并运行它，我得到这个错误日志中：

2017/03/23 10:35:48 INFO - jmeter.gui.util.MenuFactory: Skipping org.apache.jmeter.assertions.BSFAssertion 
2017/03/23 10:35:49 INFO - jmeter.gui.util.MenuFactory: Skipping org.apache.jmeter.extractor.BSFPostProcessor 
2017/03/23 10:35:49 INFO - jmeter.gui.util.MenuFactory: Skipping org.apache.jmeter.modifiers.BSFPreProcessor 
2017/03/23 10:35:49 INFO - jmeter.protocol.http.sampler.HTTPSamplerBase: Parser for text/html is org.apache.jmeter.protocol.http.parser.LagartoBasedHtmlParser 
2017/03/23 10:35:49 INFO - jmeter.protocol.http.sampler.HTTPSamplerBase: Parser for application/xhtml+xml is org.apache.jmeter.protocol.http.parser.LagartoBasedHtmlParser 
2017/03/23 10:35:49 INFO - jmeter.protocol.http.sampler.HTTPSamplerBase: Parser for application/xml is org.apache.jmeter.protocol.http.parser.LagartoBasedHtmlParser 
2017/03/23 10:35:49 INFO - jmeter.protocol.http.sampler.HTTPSamplerBase: Parser for text/xml is org.apache.jmeter.protocol.http.parser.LagartoBasedHtmlParser 
2017/03/23 10:35:49 INFO - jmeter.protocol.http.sampler.HTTPSamplerBase: Parser for text/vnd.wap.wml is org.apache.jmeter.protocol.http.parser.RegexpHTMLParser 
2017/03/23 10:35:49 INFO - jmeter.protocol.http.sampler.HTTPSamplerBase: Parser for text/css is org.apache.jmeter.protocol.http.parser.CssParser 
2017/03/23 10:35:49 INFO - jorphan.exec.KeyToolUtils: keytool found at 'keytool' 
2017/03/23 10:35:49 INFO - jmeter.protocol.http.proxy.ProxyControl: HTTP(S) Test Script Recorder SSL Proxy will use keys that support embedded 3rd party resources in file /Users/jordan/Downloads/apache-jmeter-3.1/bin/proxyserver.jks 
2017/03/23 10:35:49 INFO - jmeter.gui.util.MenuFactory: Skipping org.apache.jmeter.protocol.java.sampler.BSFSampler 
2017/03/23 10:35:49 INFO - jmeter.gui.util.MenuFactory: Skipping org.apache.jmeter.protocol.mongodb.config.MongoSourceElement 
2017/03/23 10:35:49 INFO - jmeter.gui.util.MenuFactory: Skipping org.apache.jmeter.protocol.mongodb.sampler.MongoScriptSampler 
2017/03/23 10:35:49 INFO - jmeter.gui.util.MenuFactory: Skipping org.apache.jmeter.timers.BSFTimer 
2017/03/23 10:35:49 INFO - jmeter.gui.util.MenuFactory: Skipping org.apache.jmeter.visualizers.BSFListener 
2017/03/23 10:35:49 INFO - jmeter.gui.util.MenuFactory: Skipping org.apache.jmeter.visualizers.MonitorHealthVisualizer 
2017/03/23 10:35:49 INFO - jmeter.samplers.SampleResult: Note: Sample TimeStamps are START times 
2017/03/23 10:35:49 INFO - jmeter.samplers.SampleResult: sampleresult.default.encoding is set to ISO-8859-1 
2017/03/23 10:35:49 INFO - jmeter.samplers.SampleResult: sampleresult.useNanoTime=true 
2017/03/23 10:35:49 INFO - jmeter.samplers.SampleResult: sampleresult.nanoThreadSleep=5000 
2017/03/23 10:38:54 INFO - jmeter.services.FileServer: Default base='/Users/jordan' 
2017/03/23 10:38:54 INFO - jmeter.gui.action.Load: Loading file: /Users/jordan/Downloads/apache-jmeter-3.1/bin/test-plans/kafka-test.jmx 
2017/03/23 10:38:54 INFO - jmeter.services.FileServer: Set new base='/Users/jordan/Downloads/apache-jmeter-3.1/bin/test-plans' 
2017/03/23 10:38:54 INFO - jmeter.save.SaveService: Testplan (JMX) version: 2.2. Testlog (JTL) version: 2.2 
2017/03/23 10:38:54 INFO - jmeter.save.SaveService: Using SaveService properties file encoding UTF-8 
2017/03/23 10:38:54 INFO - jmeter.save.SaveService: Using SaveService properties version 3.1 
2017/03/23 10:38:54 INFO - jmeter.save.SaveService: All converter versions present and correct 
2017/03/23 10:38:54 INFO - jmeter.save.SaveService: Loading file: /Users/jordan/Downloads/apache-jmeter-3.1/bin/test-plans/kafka-test.jmx 
2017/03/23 10:38:54 INFO - jmeter.services.FileServer: Set new base='/Users/jordan/Downloads/apache-jmeter-3.1/bin/test-plans' 
2017/03/23 10:39:04 INFO - jmeter.engine.StandardJMeterEngine: Running the test! 
2017/03/23 10:39:04 INFO - jmeter.samplers.SampleEvent: List of sample_variables: [] 
2017/03/23 10:39:04 INFO - jmeter.samplers.SampleEvent: List of sample_variables: [] 
2017/03/23 10:39:04 INFO - jmeter.protocol.java.sampler.JavaSampler: Created class: co.signal.kafkameter.KafkaProducerSampler. Uses tearDownTest: true 
2017/03/23 10:39:04 INFO - jmeter.gui.util.JMeterMenuBar: setRunning(true,*local*) 
2017/03/23 10:39:05 INFO - jmeter.engine.StandardJMeterEngine: Starting ThreadGroup: 1 : Thread Group 
2017/03/23 10:39:05 INFO - jmeter.engine.StandardJMeterEngine: Starting 1 threads for group Thread Group. 
2017/03/23 10:39:05 INFO - jmeter.engine.StandardJMeterEngine: Thread will continue on error 
2017/03/23 10:39:05 INFO - jmeter.threads.ThreadGroup: Starting thread group number 1 threads 1 ramp-up 1 perThread 1000.0 delayedStart=false 
2017/03/23 10:39:05 INFO - jmeter.threads.ThreadGroup: Started thread group number 1 
2017/03/23 10:39:05 INFO - jmeter.engine.StandardJMeterEngine: All thread groups have been started 
2017/03/23 10:39:05 INFO - jmeter.threads.JMeterThread: Thread started: Thread Group 1-1 
2017/03/23 10:39:05 ERROR - jmeter.threads.JMeterThread: Test failed! java.lang.NoClassDefFoundError: org/apache/log4j/Logger 
    at kafka.utils.Logging$class.logger(Logging.scala:24) 
    at kafka.utils.VerifiableProperties.logger(VerifiableProperties.scala:23) 
    at kafka.utils.Logging$class.info(Logging.scala:66) 
    at kafka.utils.VerifiableProperties.info(VerifiableProperties.scala:23) 
    at kafka.utils.VerifiableProperties.verify(VerifiableProperties.scala:180) 
    at kafka.producer.ProducerConfig.<init>(ProducerConfig.scala:57) 
    at co.signal.kafkameter.KafkaProducerSampler.setupTest(KafkaProducerSampler.java:90) 
    at org.apache.jmeter.protocol.java.sampler.JavaSampler.sample(JavaSampler.java:193) 
    at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:475) 
    at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:418) 
    at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:249) 
    at java.lang.Thread.run(Thread.java:745) 
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Logger 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 
    ... 12 more 

2017/03/23 10:39:05 INFO - jmeter.threads.JMeterThread: Thread finished: Thread Group 1-1 
2017/03/23 10:39:05 INFO - jmeter.engine.StandardJMeterEngine: Notifying test listeners of end of test 
2017/03/23 10:39:05 WARN - jmeter.engine.StandardJMeterEngine: Error encountered during shutdown of [email protected] java.lang.NullPointerException 
    at co.signal.kafkameter.KafkaProducerSampler.teardownTest(KafkaProducerSampler.java:96) 
    at org.apache.jmeter.protocol.java.sampler.JavaSampler.testEnded(JavaSampler.java:292) 
    at org.apache.jmeter.engine.StandardJMeterEngine.notifyTestListenersOfEnd(StandardJMeterEngine.java:216) 
    at org.apache.jmeter.engine.StandardJMeterEngine.run(StandardJMeterEngine.java:437) 
    at java.lang.Thread.run(Thread.java:745) 

2017/03/23 10:39:05 INFO - jmeter.gui.util.JMeterMenuBar: setRunning(false,*local*)

所以，我得到的错误说，它不能发现org/apache/log4j/logger，但因为我不知道如何解决这个问题。我曾看过other known issues其他人遇到过，看看他们是否与我的相似，但无济于事。我想也许我写错了我的测试计划，但我找不到任何问题。有什么建议我做错了什么？

来源

2017-03-23 J-Play

这是完整的堆栈跟踪吗？ – praveen

现在，我刚刚从另一次运行中更新了它。 –

你的运行时是否有log4j jar？如果它的maven项目添加log4j作为依赖项。 – praveen

java.lang.ClassNotFoundException该异常表示在类路径中找不到类。这表明我们是试图加载类定义，并且该类不存在于的类路径中。

尝试添加log4j jar。

如果它的maven项目，你可以添加下面的依赖项，随意更改为适当的版本。

<dependency> 
    <groupId>log4j</groupId> 
    <artifactId>log4j</artifactId> 
    <version>1.2.15</version> 
</dependency>

如果有版本冲突的log4j罐子可能存在捆绑另一个罐子内尝试找出并排除log4j的JAR这也可能发生。

<dependency> 
    <groupId>org.apache.kafka</groupId> 
    <artifactId>kafka_2.10</artifactId> 
    <version>0.8.1.1</version> 
    <exclusions> 
     <exclusion> 
      <groupId>log4j</groupId> 
      <artifactId>log4j</artifactId> 
     </exclusion> 
    </exclusions> 
</dependency>

来源

2017-03-23 17:49:53 praveen

我会把log4j jar放到jMeter的lib/ext文件夹中吗？ –

当你指出我正确的方向时，将你的答案标记为已接受。感谢您的帮助。 –

我想出了这个问题。 jMeter在下载并放入所述文件夹时缺少log4j jar文件夹的lib文件夹，测试运行时没有问题。

来源

2017-03-23 19:01:56

Kafkameter NoClassDefFoundError

回答

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