我有一个Java代码来创建JMeter测试计划。但每次我尝试加载那些创建的.jmx文件时，我都会收到此错误：
Caused by: com.thoughtworks.xstream.converters.ConversionException:
---- Debugging information ----
cause-exception : java.lang.NullPointerException
cause-message : null
class : org.apache.jmeter.reporters.ResultCollector
required-type : org.apache.jmeter.reporters.ResultCollector
converter-type : org.apache.jmeter.save.converters.TestElementConverter
path : /jmeterTestPlan/org.apache.jorphan.collections.HashTree/org.apache.jorphan.collections.HashTree/ResultCollector
line number : 28
class[1] : org.apache.jorphan.collections.HashTree
converter-type[1] : org.apache.jmeter.save.converters.HashTreeConverter
-------------------------------
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:79) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.readItem(AbstractCollectionConverter.java:73) ~[xstream-1.4.9.jar:1.4.9]
at org.apache.jmeter.save.converters.HashTreeConverter.unmarshal(HashTreeConverter.java:67) ~[ApacheJMeter_core.jar:3.2 r1790748]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.readItem(AbstractCollectionConverter.java:73) ~[xstream-1.4.9.jar:1.4.9]
at org.apache.jmeter.save.converters.HashTreeConverter.unmarshal(HashTreeConverter.java:67) ~[ApacheJMeter_core.jar:3.2 r1790748]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50) ~[xstream-1.4.9.jar:1.4.9]
at org.apache.jmeter.save.ScriptWrapperConverter.unmarshal(ScriptWrapperConverter.java:95) ~[ApacheJMeter_core.jar:3.2 r1790748]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1230) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1214) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1085) ~[xstream-1.4.9.jar:1.4.9]
at org.apache.jmeter.save.SaveService.readTree(SaveService.java:442) ~[ApacheJMeter_core.jar:3.2 r1790748]
... 21 more
Caused by: java.lang.NullPointerException
at java.util.Hashtable.get(Hashtable.java:363) ~[?:1.8.0_121]
at java.util.Properties.getProperty(Properties.java:969) ~[?:1.8.0_121]
at org.apache.jmeter.save.SaveService.aliasToClass(SaveService.java:285) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.save.converters.TestElementConverter.unmarshal(TestElementConverter.java:93) ~[ApacheJMeter_core.jar:3.2 r1790748]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.readItem(AbstractCollectionConverter.java:73) ~[xstream-1.4.9.jar:1.4.9]
at org.apache.jmeter.save.converters.HashTreeConverter.unmarshal(HashTreeConverter.java:67) ~[ApacheJMeter_core.jar:3.2 r1790748]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.readItem(AbstractCollectionConverter.java:73) ~[xstream-1.4.9.jar:1.4.9]
at org.apache.jmeter.save.converters.HashTreeConverter.unmarshal(HashTreeConverter.java:67) ~[ApacheJMeter_core.jar:3.2 r1790748]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50) ~[xstream-1.4.9.jar:1.4.9]
at org.apache.jmeter.save.ScriptWrapperConverter.unmarshal(ScriptWrapperConverter.java:95) ~[ApacheJMeter_core.jar:3.2 r1790748]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1230) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1214) ~[xstream-1.4.9.jar:1.4.9]
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1085) ~[xstream-1.4.9.jar:1.4.9]
at org.apache.jmeter.save.SaveService.readTree(SaveService.java:442) ~[ApacheJMeter_core.jar:3.2 r1790748]
... 21 more
以下是Java代码：
import org.apache.jmeter.config.Arguments;
import org.apache.jmeter.config.gui.ArgumentsPanel;
import org.apache.jmeter.control.LoopController;
import org.apache.jmeter.control.gui.LoopControlPanel;
import org.apache.jmeter.control.gui.TestPlanGui;
import org.apache.jmeter.engine.StandardJMeterEngine;
import org.apache.jmeter.protocol.java.sampler.JSR223Sampler;
import org.apache.jmeter.reporters.ResultCollector;
import org.apache.jmeter.reporters.Summariser;
import org.apache.jmeter.save.SaveService;
import org.apache.jmeter.testbeans.gui.TestBeanGUI;
import org.apache.jmeter.testelement.TestElement;
import org.apache.jmeter.testelement.TestPlan;
import org.apache.jmeter.threads.ThreadGroup;
import org.apache.jmeter.threads.gui.ThreadGroupGui;
import org.apache.jmeter.util.JMeterUtils;
import org.apache.jmeter.visualizers.SummaryReport;
import org.apache.jorphan.collections.HashTree;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Locale;
import java.util.UUID;
class JedisSampler {
private static String DEFAULT_SCRIPT_LANGUAGE = "groovy";
private static String JMETER_HOME = "src/test/jmeter/";
private static String JMETER_PROPERTIES_FILE = JMETER_HOME + "bin/jmeter.properties";
private static String JMETER_REPORTS_HOME = "target/jmeter/";
void createAndRunJmeterTestPlan(int numberOfThreads, int rampUpPeriodInSeconds, int loopCount, String testName, String script) throws Exception {
setUpJMeterUtils();
TestPlan testPlan = setUpTestPlan(testName);
HashTree testPlanTree = new HashTree();
testPlanTree.add(testPlan);
Summariser summer = setSummariser();
testPlanTree.add(testPlanTree.getArray()[0], setLogger(testName, summer));
testPlanTree.add(testPlanTree.getArray()[0], setLoggerCSV(testName, summer));
ThreadGroup threadGroup = setUpThreadGroup(numberOfThreads, rampUpPeriodInSeconds, setUpLoopController(loopCount));
HashTree threadGroupHashTree = testPlanTree.add(testPlan, threadGroup);
threadGroupHashTree.add(setUpJSR223Sampler(script));
SaveService.saveTree(testPlanTree, new FileOutputStream(JMETER_REPORTS_HOME + testName + ".jmx"));
StandardJMeterEngine jmeter = new StandardJMeterEngine();
jmeter.configure(testPlanTree);
jmeter.run();
System.out.println("Test completed. See " + JMETER_REPORTS_HOME + testName + ".jtl file for results");
System.out.println("JMeter .jmx script is available at " + JMETER_REPORTS_HOME + testName + "-summary.jmx");
jmeter.exit();
}
JSR223Sampler setUpJSR223Sampler(String script) {
JSR223Sampler jedisSampler = new JSR223Sampler();
jedisSampler.setName("Jedis Sampler");
jedisSampler.setProperty("script", script);
jedisSampler.setProperty("scriptLanguage", DEFAULT_SCRIPT_LANGUAGE);
jedisSampler.setProperty("cacheKey", UUID.randomUUID().toString());
jedisSampler.setProperty(TestElement.TEST_CLASS, JSR223Sampler.class.getName());
jedisSampler.setProperty(TestElement.GUI_CLASS, TestBeanGUI.class.getName());
return jedisSampler;
}
// to set loop running forever, loopCount should be equal to -1
LoopController setUpLoopController(int loopCount) {
LoopController loopController = new LoopController();
loopController.setLoops(loopCount);
loopController.setFirst(true);
loopController.setProperty(TestElement.TEST_CLASS, LoopController.class.getName());
loopController.setProperty(TestElement.GUI_CLASS, LoopControlPanel.class.getName());
loopController.initialize();
return loopController;
}
ThreadGroup setUpThreadGroup(int numberOfThreads, int rampUpPeriodInSeconds, LoopController loopController) {
ThreadGroup threadGroup = new ThreadGroup();
threadGroup.setName("Jedis Thread Group");
threadGroup.setNumThreads(numberOfThreads);
threadGroup.setRampUp(rampUpPeriodInSeconds);
threadGroup.setSamplerController(loopController);
threadGroup.setProperty(TestElement.TEST_CLASS, ThreadGroup.class.getName());
threadGroup.setProperty(TestElement.GUI_CLASS, ThreadGroupGui.class.getName());
return threadGroup;
}
Summariser setSummariser() {
//add Summarizer output to get test progress in stdout like:
// summary = 2 in 1.3s = 1.5/s Avg: 631 Min: 290 Max: 973 Err: 0 (0.00%)
Summariser summer = null;
String summariserName = JMeterUtils.getPropDefault("summariser.name", "summary");
if (summariserName.length() > 0) {
summer = new Summariser(summariserName);
}
return summer;
}
ResultCollector setLogger(String testName, Summariser summer) {
String logFile = JMETER_REPORTS_HOME + testName + "-summary.jtl";
ResultCollector logger = new ResultCollector(summer);
logger.setFilename(logFile);
return logger;
}
ResultCollector setLoggerCSV(String testName, Summariser summer) {
String csvLogFile = JMETER_REPORTS_HOME + testName + "-summary.csv";
ResultCollector csvlogger = new ResultCollector(summer);
csvlogger.setFilename(csvLogFile);
return csvlogger;
}
TestPlan setUpTestPlan(String testName) {
TestPlan testPlan = new TestPlan(testName + " Plan");
testPlan.setProperty(TestElement.TEST_CLASS, TestPlan.class.getName());
testPlan.setProperty(TestElement.GUI_CLASS, TestPlanGui.class.getName());
testPlan.setUserDefinedVariables((Arguments) new ArgumentsPanel().createTestElement());
return testPlan;
}
void setUpJMeterUtils() throws IOException {
if (!Files.exists(Paths.get(JMETER_REPORTS_HOME))) {
Files.createDirectory(Paths.get(JMETER_REPORTS_HOME));
}
JMeterUtils.loadJMeterProperties(JMETER_PROPERTIES_FILE);
JMeterUtils.setLocale(Locale.ENGLISH);
JMeterUtils.setJMeterHome(JMETER_HOME);
}
}
请告知如何解决此问题。
谢谢！
答案 0 :(得分：0)
这一行：
SaveService.saveTree(testPlanTree, new FileOutputStream(JMETER_REPORTS_HOME + testName + ".jmx"));
应该之前这些行：
testPlanTree.add(testPlanTree.getArray()[0], setLogger(testName, summer));
testPlanTree.add(testPlanTree.getArray()[0], setLoggerCSV(testName, summer));
更多信息：