JMeter 并发负载测试：RMI 类加载器已禁用

Question

While running the distributed load testing using concurrency thread group from blazemeter, I getting the error : "Error in rconfigure() method java.rmi.ServerExeption...java.ClassNotFoundExeption:com.Blazemeter.jmeter.threads.concurrency.ConcurrencyThreadgroup(no Security manager: RMI Class Loader disabled)

I have researched on the net and the only related issue I found is this one:

JMeter load-testing : ClassNotFoundException: com.blazemeter.jmeter.threads.concurrency.ConcurrencyThreadGroup

Unlike this thread, I have the latest version 3.3 on my machines. The jmeter logs are as follows:

 2018-01-22 17:03:50,749 INFO oajeDistributedRunner: Configuring remote engine: 10.0.104.58 2018-01-22 17:03:50,764 INFO

oajeDistributedRunner: Starting remote engines 2018-01-22 17:03:50,764 INFO oajeDistributedRunner: Starting the test @ Mon Jan 22 17:03:50 EST 2018 (1516658630764) 2018-01-22 17:03:50,764 INFO oajeClientJMeterEngine: running clientengine run method 2018-01-22 17:03:50,780 INFO oajsStandardSampleSender: Using StandardSampleSender for this test run 2018-01-22 17:03:50,780 INFO oajsStandardSampleSender: Using StandardSampleSender for this test run 2018-01-22 17:03:50,827 ERROR oajeClientJMeterEngine: Error in rconfigure() method java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.lang.ClassNotFoundException: com.blazemeter.jmeter.threads.concurrency.ConcurrencyThreadGroup (no security manager: RMI class loader disabled) 2018-01-22 17:09:10,937 INFO oajeDistributedRunner: Remote engines have been started

Pleas let me know how to overcome this issue. Thanks

Answer 1

The error indicate you are using Concurrency Thread Group which wasn't found in one of your slaves. Your JMeter version should be equal to master which is the first rule of distributed load testing :

Step 0: Configure the nodes

Make sure that all the nodes (client and servers) :

> are running exactly the same version of JMeter.

Answer 2

If you are using jmeter-taurus, adding these to the Jmeter Executor did the trick:

modules:
  jmeter:
    force-ctg: true   
    detect-plugins: true

Although the documentation said it is enabled by default, somehow that wasn't the case for one of my worker servers, this forced it to install the required Concurrency Thread Group(ctg) plugin.