If your test needs to randomize values from a static list of values, there are a number of ways to script this. Jmeter has a new built in function called RandomFromMultipleVars which I have found to be a great time saver.
First create a UDV. For this example I have created five variables with corresponding static values. The variable is an animal and the value is a type of animal.
Next add a sampler with a JSR223 PreProcessor and paste this code:
String randAnimal = "${__RandomFromMultipleVars(dog|cat|cow|horse|bird)}";
log.info("Random animal type is " + randAnimal);
Please note that there are double quotes around the function call. This is to ensure that the value is stored as a string.
Open the log viewer and run a few threads.
You should see the value randomized for each thread:
Test automation tips from LobsterMan 