我希望通过jMeter extension安装的jMeter plugin manager向Kafka消费者发送动态生成的消息来加载测试Kafka。
我的Kafka已经完美配置，设置和运行。我跟着these instructions设置了一个Kafka测试计划并运行它，但是每次我设置并运行它时，我都会在日志中收到此错误：
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 org.apache.jmeter.protocol.java.sampler.JavaSampler@51cd3642 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，我得到的错误说它找不到org/apache/log4j/logger，但我不知道如何解决这个问题。我看过other known issues其他人遇到的问题，看看他们是否与我的相似，但无济于事。我想也许我写的测试计划错了，但我找不到任何问题。对于我做错了什么有什么建议吗？
答案 0 :(得分：2)
java.lang.ClassNotFoundException此异常表示该 类路径上找不到类。这表明我们是 试图加载类定义，并且该类不存在 classpath。
尝试添加log4j jar。
如果是maven项目，您可以添加以下依赖，随意更改为适当的版本。
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.15</version>
</dependency>
如果存在版本冲突，也可能发生这种情况，因为另一个jar中捆绑的log4j jar可能会找出并排除log4j jar。
<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>
答案 1 :(得分：0)
我想出了这个问题。 jMeter在其lib文件夹中缺少log4j jar，当下载并放入所述文件夹时，测试运行没有问题。