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jmeterbeanshell

In Jmeter vars vs props for while controller

Before test, I added x variables to TestPlans, After I run test as 10 thread 10 seconds ramp up In while controller for condition that

${__javaScript("${x}" != "",)}

In beanshell:

vars.put("x","");

Normally, each thread occured 1 second, First thread changed x variable as "", therefore another threads don't meet if condition. why do threads get looped though ?

Note: Other threads did not start testing when using property instead of variable.

Solution

  • As per JMeter documentation:

    Properties are not the same as variables. Variables are local to a thread; properties are common to all threads

    so when you do vars.put("x",""); you change x variable value only for the current thread, other threads have their own values of the x variable.

    If you want to amend the value so it would be visible for all threads - you will have to:

    1. Change vars.put("x",""); to props.put("x","");
    2. In the While Controller ${__javaScript("${__P(x,)}" != "",)}

    Also: since JMeter 3.1 it's recommended to use JSR223 Test Elements and Groovy language for scripting so it worth considering migrating (the same applies to __javaScript() function in the While Controller), more information: Beanshell vs. JSR223 vs. Java For JMeter: Complete Showdown