Jmeter env custom function doesn't read environment variable



  • I was following blazemeter tutorial on how to run Jmeter script from the command line (cmd.exe in Windows10 OS). I'm trying to pass environment variable to the Jmeter ${__env} (according to this page) custom function, using Jmeter script from the command line. Below is the screenshot of the env function in Jmeter UI

    with quotes

    I've also tried without quotes ${__env(password)} and also using JSR223 PreProcessor

    vars.put("password",${__env(password)}); 
    

    but that didn't work either.

    Below is my command line

    set password=MyPassword123
    jmeter -n -t C:\Work\Jmeter\MyScript.jmx
    

    But Jmeter fails to execute my test plan

    Creating summariser <summary>
    Created the tree successfully using C:\Work\Jmeter\MyScript.jmx
    Starting the test @ Fri Sep 28 16:45:38 EDT 2018 (1538167538606)
    Waiting for possible Shutdown/StopTestNow/Heapdump message on port 4445
    summary =      2 in 00:00:01 =    3.1/s Avg:   250 Min:     1 Max:   499 Err:     1 (50.00%)
    Tidying up ...    @ Fri Sep 28 16:45:39 EDT 2018 (1538167539431)
    ... end of run
    

    Is it possible to read environment variable using Jmeter? How to properly set it up. Has anyone able to achieve this before? Thanks a lot people!



    1. When you use User Defined Variables remove the quotation marks around "password", to wit:

      ${__env(password,,) 
      
    2. When you use JSR223 Elements don't inline the function into the script body, either go for "Parameters" section or use code-based equivalent instead like:

      vars.put("password", System.getenv("password"))
      

      This is a form of "soft requirement" because JMeter Functions and Variables syntax conflicts with GString Templates. Moreover it makes Groovy script compilation caching impossible negatively impacting the performance. Check out Apache Groovy - Why and How You Should Use It article for more information regarding using Groovy scripting in JMeter tests

    Demo:

    JMeter Env Function Groovy



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