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I am trying to run a jmeter test script which has a single websocket sampler.It works fine when i run it from single machine through java GUI or command line.

But , When i try to run it on remote host (by running jmeter-server on other machine) then following exception is thrown.

ERROR 

- jmeter.engine.ClientJMeterEngine: 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: JMeter.plugins.functional.samplers.websocket.WebSocketSampler (no security manager: RMI class loader disabled) 
2016/10/06 07:03:20 INFO  - jmeter.engine.ClientJMeterEngine: Interrupting RMI Reaper

Both Master/slave jmeter installations are having same version of jmeter(v3.0) and websocket plugin(v1.0.2).

Any other http distributed test runs fine when it is run in same setup.

Raj
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1 Answers1

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According to the error message, it looks like the WebSocket plugin is missing on the remote slave. The main pre-requisite of distributed JMeter tests execution is having the same JMeter version with the same config, plugins, 3rd-party libraries, etc. on remove slaves as on the master.

So make sure you have identical setup on master and all the slaves, i.e. install the WebSocket Sampler to all the slaves.

  • JMeter restart will be required to pick the plugins up
  • The easiest way of installing JMeter Plugins and keeping them up-to-date is using JMeter Plugins Manager
Dmitri T
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  • Yeah, I am aware of the requirement of same jmeter and plugin versions. In-fact i took the folder in which plugin is already deployed/installed (A Linux machine) and copied it in to 1 window master machine and 2 linux slave machines. – Raj Oct 06 '16 at 17:07