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I am trying to build a Jmeter test plan that can make http calls to a server. Each thread in the thread group will read 2 parameters from a CSV file and make the http call with the params, and continue to make the same call with same parameters for lets say 1000 times with a delay of 10s between each thread execution.

The http call looks like 

/service/method?param1=${param1}&param2=${param2}

The CSV is like this:

1,2
3,4
5,6
7,8

I have the test plan set up that works for the most part except the single issue. I want each thread to use the same parameters (same line of input) whenever the thread executes. Currently the only way to do it is to set Recycle on EOF = true, but the threads randomly pick the values. Param1 and Param2 can be randomly generated values as long as they stick with the same thread throughout the execution.

Is there anyway I can achieve this?

Thanks!

Aliaksandr Belik
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pkrish
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2 Answers2

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I'm not really sure I understand your issue right (you can possibly describe it more explicitly or using an example) but the schema below should implement your test-plan description:

Test Plan
    Thread Group
    Number of Threads: N
        . . .
        While Controller
        Condition: ${__javaScript("${param2"!="<EOF>",)} - read csv-file until the EOF 
            CSV Data Set Config
            Filename: [path to your file with test-data]
            Variable Names: param1,param2
            Recycle on EOF? False
            Stop thread on EOF? True
            Sharing mode: Current thread group
            Loop Controller
            Loop Count = 1000 - number of loops for each thread, with the same params
                HTTP Request - your http call
                Test Action
                Target = Current Thread
                Action = Pause
                Duration (ms) = 10000 - pause between calls
            . . .

In case if you need that each of N threads reads and uses single and unique line from csv-file you have to set Sharing mode: Current thread group for CSV Data Set Config (number of csv-entries should be in this case the sane as threads number, or Recycle on EOF? False should be set otherwise).
In case if you need that each of N threads reads and uses all lines from csv-file you have to set Sharing mode: Current thread for CSV Data Set Config.

If that's not what you want please describe your issue a bit more clear.

Aliaksandr Belik
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  • See my answer for a hack. I did try to do something similar to what you have described (before posting this question), but I found that if you set Recycle on EOF? False, then the test stops after 1 run. If Recycle on EOF? True, then there is no way to control the params for each thread. For example, if 1 thread takes a long time to return. – pkrish Sep 14 '12 at 03:24
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I was able to find sort of a hack. Basically I just put a constant timer for each thread and used the thread number ${__threadNum} as the parameter to fit my constraint of having the same parameter to be used by the same thread.

I would still prefer a way to read the params from a csv file.

pkrish
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