Cannot passing value from non-gui mode if it match the IF Controller condition in JMeter

Question

I've below setup, i've tried to pass the value from non-gui mode but it doesn't work.

1. Config Element/User Defined Variable: portNum:8080
2. Config Element/HTTP Request Defaults: Port Number: ${__P(portNum,${portNum})}
3. I've created 2 If Controller something like below. It will execute those if controller if it match the port number First If Controller: ${__jexl3("${portNum}" == "8080")} Second If Controller: ${__jexl3("${portNum}" == "8888")}
4. It works when i run it from GUI mode but not from command line c:\jmeter\apache-jmeter-5.2.1\apache-jmeter-5.2.1\bin> jmeter -DportNum=8888 c:\Jmeter\TestVariable.jmx

From the command line, i've set the portNum value with 8888. but it didn't work. Any ideas how to solve this?

Answer 1

-D command-line argument sets a Java System Property, you won't be able to get its value using __P() function, if you want to proceed - consider switching to i.e. __groovy() function which should look like:

${__groovy(System.getProperty('portNum'),)} 

otherwise consider moving from -D to -J which sets a JMeter Property which can be accessed your way.

More information:

• Configuring JMeter
• Overriding Properties Via The Command Line
• Apache JMeter Properties Customization Guide

Also according to JMeter Best Practices you should always be using the latest version of JMeter so maybe it worth considering upgrading.

Answer 2

You can pass the value of the portNum variable from the command line while running your JMeter script in non-GUI mode by using the following command:

jmeter -JportNum=8888 -n -t c:\Jmeter\TestVariable.jmx -l c:\Jmeter\results.jtl

Here, the -J option is used to set the value of a system property. The -n option runs JMeter in non-GUI mode and the -t option specifies the path to your JMeter script. The -l option specifies the path to the output results file.

Also, in the first If Controller, you need to change the condition to:

${__jexl3("${portNum}" == "8080")}

and in the second If Controller, you need to change the condition to:

${__jexl3("${portNum}" == "8888")}