Why do you need to use custom jars in JMeter? In some cases, we need to share or pass variables between threads and thread groups in JMeter. There are a few ways to do this and using custom jars in Jmeter is one of them. At JMeter documentation: But sometimes we want to ensure synchronization between threads and thread groups. In this case, one of the best ways is to "write your own Java classes." Creating a Custom Jar Create a new java class in your favorite IDE. Our java package structure is as follows: Create the methods that you need [...]