Concurrent Threads graph is showing 0 in JMeter bzm - Concurrency Thread Group while using tstFeedback function

Question

I am new to JMeter. I have a test plan with the 'Concurrency thread group' along with 'Throughput Shaping Timer'. In the 'Target Concurrency' field of the 'Concurrency thread group', I am using the schedule feedback function to maintain thread count required. However, the 'concurrent threads' graph is not showing as per the value mentioned in the feedback function instead, it is showing 0. How to fix this so, the graph reflects the threads mentioned in the feedback function? I have given the screenshot of my thread group concurrent thread group

Answer 1

Given you integrate Concurrency Thread Group with the Throughput Shaping Timer the chart with anticipated concurrency can be observer in the Throughput Shaping Timer as the function cannot be evaluated while your script is not running.

Answer 2

I managed to resolve this. I downloaded the Throughput Shaping Timer plugin from the JMeter plugins website and added it into my JMeter installation directory: /usr/local/Cellar/jmeter/⁨5.2.1⁩/⁨libexec⁩/lib⁩. And a restart to the JMeter fixed it. Now, the __tstFeedback function is supplying the concurrent threads dynamically.