'JMeter ConcurrencyThreadGroup object creation throws java.lang.ExceptionInInitializerError error

I am trying to upgrade my JMeter DSL implementation to the latest JMeter version(5.4.3). But I got an issue with ConcurrencyThreadGroup object creation, it throws an exception. See the below exception

Using following versions

JMeter 5.4.3

jmeter-plugins-standard 1.4.0

Method implementation

public ConcurrencyThreadGroup getConcurrencyThreadGroup(String name, String targetConcurrency,
                                                            String rampUpTime, String rampUpStepCount, String timeUnit, String holdTargetTime,
                                                            boolean setEnabled
    ) {
        
        ConcurrencyThreadGroup concurrencyThreadGroup = new ConcurrencyThreadGroup();
        concurrencyThreadGroup.setName(name);
        concurrencyThreadGroup.setTargetLevel(targetConcurrency);
        concurrencyThreadGroup.setRampUp(rampUpTime);
        concurrencyThreadGroup.setSteps(rampUpStepCount);
        concurrencyThreadGroup.setUnit(timeUnit);
        concurrencyThreadGroup.setHold(holdTargetTime);
        concurrencyThreadGroup.setEnabled(setEnabled);
        concurrencyThreadGroup.setProperty("TestElement.test_class", ConcurrencyThreadGroup.class.getName());
        concurrencyThreadGroup.setProperty("TestElement.gui_class", ConcurrencyThreadGroupGui.class.getName());
      
        return concurrencyThreadGroup;
    }

Observing below exception when try to execute

    at org.apache.jmeter.reporters.ResultCollector.<init>(ResultCollector.java:167)
    at org.apache.jmeter.reporters.ResultCollector.<init>(ResultCollector.java:157)
    at com.blazemeter.jmeter.reporters.FlushingResultCollector.<init>(FlushingResultCollector.java:7)
    at com.blazemeter.jmeter.threads.AbstractDynamicThreadGroupModel.<init>(AbstractDynamicThreadGroupModel.java:28)
    at com.blazemeter.jmeter.threads.AbstractDynamicThreadGroup.<init>(AbstractDynamicThreadGroup.java:23)
    at com.blazemeter.jmeter.threads.concurrency.ConcurrencyThreadGroup.<init>(ConcurrencyThreadGroup.java:11)
    at org.qa.perf.jmeter.api.threadgroups.QADSLThreadGroup.getConcurrencyThreadGroup(QADSLThreadGroup.java:136)
    at org.qa.perf.jmeter.dsl.QADSLJMeterDSL.concurrencyThreadGroup(QADSLJMeterDSL.java:93)
    at org.qa.perf.dsl.sample.threadgroup.ConcurrencyThreadGroupSampleTest$1.prepareJMeterTestPlan(ConcurrencyThreadGroupSampleTest.java:20)
    at org.qa.perf.jmeter.engine.QADSLPerfTestClient.executeTest(QADSLPerfTestClient.java:29)
    at org.qa.perf.dsl.sample.threadgroup.ConcurrencyThreadGroupSampleTest.testConcurrencyThreadGroupSampleTest(ConcurrencyThreadGroupSampleTest.java:29)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)
    at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:599)
    at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:174)
    at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
    at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:822)
    at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:147)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
    at java.util.ArrayList.forEach(ArrayList.java:1259)
    at org.testng.TestRunner.privateRun(TestRunner.java:764)
    at org.testng.TestRunner.run(TestRunner.java:585)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:384)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:378)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:337)
    at org.testng.SuiteRunner.run(SuiteRunner.java:286)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1218)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
    at org.testng.TestNG.runSuites(TestNG.java:1069)
    at org.testng.TestNG.run(TestNG.java:1037)
    at com.intellij.rt.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:66)
    at com.intellij.rt.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:109)
Caused by: java.lang.NullPointerException
    at org.apache.jmeter.samplers.SampleSaveConfiguration.<clinit>(SampleSaveConfiguration.java:287)
    ... 38 more

Appreciate any clue or solution to solve this issue.

jmeter


Solution 1:[1]

You're supposed to show your full code and full stacktrace as the partials unfortunately don't tell the full story.

Most probably you didn't load JMeter Properties which are responsible for the Results File Configuration so my expectation is that you need to call the following function somewhere in the beginning of your code:

org.apache.jmeter.util.JMeterUtils.loadJMeterProperties("/path/to/your/jmeter.properties")

More information:

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Dmitri T

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