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I have designed a case to wait for specific model name in GET response and then POST data. It is tested and is working fine when only 1 user and 1 loop are set. When the specific model name is found, then proceed to deploy the model.

JSON Extractor

$..valid_model_list[?(@.model_name =~ /.*Model-Test-${variable}-${counter}-v1-8k/i)]

While Controller

${__jexl3("${modelnameresult_matchNr}" != "1",)}

However, when I ramp up the test to use 2 users and 2 loops. The result isn't as per expectation.

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Question 1: Why JMeter isn't running the request in sequence when multiple users and loop are set?

How do I design it in a better way to avoid false-positives in results?

Question 2: The GET (TrainedModelsList) constant timer is set to 1 minute and expectation is that it continues running till the end of the test. It seems it just run to a certain period and stopped. What type of timer should be used in this case?

JMeter deployed these model successfully

Model-Test-2022-02-28T09:46:40784-0001-v1-8k
Model-Test-2022-02-28T09:46:42785-0002-v1-8k
Model-Test-2022-02-28T09:46:44784-0003-v1-8k
Model-Test-2022-02-28T09:46:46783-0004-v1-8k

JMeter start deploy the model and fail although these models are not yet found:

Model-Test-2022-02-28T10:02:51745-0006-v1-8k
Model-Test-2022-02-28T10:18:18831-0007-v1-8k
Model-Test-2022-02-28T10:34:21111-0008-v1-8k
Model-Test-2022-02-28T10:50:24376-0009-v1-8k

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Updated with view result notes where the problem occurred at second loop:

enter image description here

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1 Answer 1

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  • Question 1: Why JMeter isn't run the request in sequence when multiple user and loop is set?

    Each JMeter thread (virtual user) executing Samplers upside down, you can add __threadNum() function and ${__jm__While Controller__idx} pre-defined variable and you will see it yourself.

    I don't know the full details of the test plan

  • Question 2: The GET (TrainedModelsList) constant timer 1minute and expect it continues running till the end of the test. It seems it just run to a certain period and stopped. What type of timer should be used in this case?

    I don't know what you're trying to achieve, Constant Timer will create a delay before the requests in its scope, if you want to run the requests for one minute either amend the While Controller condition or use Runtime Controller

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  • I have tried adding ${__threadNum()} at request name, the view result show a number at each thread, it is just showing the thread number, how do I control them? the test plan req1 post, req2 get and wait while condition (this req 2 should use the variable of user1 only), req3 post (this req 3 should use the variable of user1 only), right now all requests mixed by user 1,2,3,4,5 randomly. Feb 28 at 8:17
  • I updated main post with view result. the problem occurred at second loop. Feb 28 at 10:08

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