Jmeter get requests failing to exit for existing response

Question

I want to let JMeter exit while controller when response value "model_name": "Model-Corpus-JMeter2-0001-v1-8k" is found in response data.

sample response data:

{
    "message": "success",
    "valid_model_list": [{
            "meta_data": {
                "corpus_list": [
                    "test1"
                ],
                "id": "1",
                "sample_rate": 16000,
                "test_duration": "0.17 hrs"
            },
            "model_name": "Model-Corpus-JMeter2-0001-v1-8k",
            "status": "ok"
        },
        {
            "meta_data": {
                "corpus_list": [
                    "test1"
                ],
                "id": "2",
                "sample_rate": 16000,
                "test_duration": "0.17 hrs"
            },
            "model_name": "testmod2-v1-8k",
            "status": "ok"
        }
    ]
}

I have set while controller condition ${__jexl3("${model_name}" != "Model-Corpus-JMeter2-0001-v1-8k",)}

The JSON expression is tested works to extract a list of "model_name".

however, the GET request isn't exiting when the response value is already there.

Debug Sampler: captured model_name_18=Model-Corpus-JMeter2-0001-v1-8k

Answer 1

1. Your "sample response data" is not a valid JSON, you won't be able to use JSON Extractor on invalid JSON objects. Check it yourself - https://jsonlint.com/
2. Even if your JSON is correct your JSON Extractor configuration will return the first model name, not the "list", to get the "list" you will need to set "Match No" to -1
3. It's not clear what is the value of the model_name variable, you can check it using Debug Sampler and View Results Tree listener combination
4. You're stating that your While Controller condition is ${__jexl3("${model_name}" != "${modelnameresult}",)} and your screenshot shows different setup

I think it would be easier to go for Regular Expression Extractor instead.