I am running my load tests in jmeter. I have login service and a serviceX which is to be tested. I want Authtoken from login service to run serviceX. Token expires every minute. Currently I am having login service in the same thread group and running as much as serviceX. I dont want to continue this. I want to run login service once in every minute in single thread and pass the token to serviceX and ServiceX runs the defined number of threads and time. how to achieve this?
Use Once Only Controller to achieve this. This controller executes the request inside it only once per thread and passes over any other requests under it during further iterations through the test plan.
So, you can put your login service inside the Once Only Controller and serviceX outside of the controller. You have to configure your Thread Group accordingly for the iterations or you can wrap up your serviceX under Loop Controller.
Example:
Say, you want to login your first thread only once and then wants to run serviceX for 10 times, here is the below test plan sample:
Remember, as you want to log in once in a minute and once the only controller works on per thread, so you have to use rampup your thread groups accordingly. Suppose, there are 2 threads, and they will log in in a one-minute interval, then the Thread group configurations will be like:
Now, if you want to run your serviceX for 5 times after the 1st thread login, put your serviceX under the loop controller scope and the loop count value to 5
This is the results of this sample test plan:
Hope this helps!
If you use only one token across all threads (virtual users) it makes sense to add another Thread Group with 1 thread and infinite number of loops to your Test Plan and add a HTTP Request sampler to it along with the relevant Post-Processor to extract the token. Also add a Constant Timer to add pauses between requests, i.e. use 55000 milliseconds as the thread delay value.
Once you have the token you can convert it into a JMeter Property via __setProperty() function
In your "main" Thread Group you can read the current token value using __P() function
Related
I have multiple Simple Controllers under Thread group. All controllers have 1 HTTP request. Only one controller have 3 requests. How can I chain 3 requests in one simple controller to run sequentially.
Test Plan
The screenshot above is my test plan. In v4/bootstrap call I have 3 HTTP requests. Result of these 3 requests is token which I extract from get_v4/restart and then this token used for all other requests. For correct token generation 3 requests from v4/bootstrap call should run sequently. On summary report shown that amount of run 3 requests is different.
Each JMeter thread (virtual user) executes Samplers upside down. The same applies to Simple Controllers.
So you don't need to do literally anything, each thread will execute samplers sequentially as they appear in the Test Plan.
If you have more than 1 virtual user in the Thread Group you might be confused by the "wrong" order of sample results:
However each user is still executing samplers upside down, you can check it by adding __threadNum() function to show the current virtual user's number and __groovy() function calling vars.getIteration() method
You will see that each user executes samplers sequentially and starts over when the last sampler ends and there are iterations still:
I am trying to run http samplers sequentially for multiple requests. Where the output of 1 API response is the input of next API request. My concern is when I run with 5 users (for. e.g), then at given point of time it first executes 1st API with 5 users then second API with 5 users, in this process the API where input is required gets lost. Please help me on this.Actually I have used transaction controller also but here not sequentially api run,so getting file not found exception bcause of first api output response parameter is not passed to second api as a input parameter
I need a solution, where all the samplers are first executed for first user, then for second thread all the samplers are executed and so on.
Each JMeter Thread (virtual user) executes Samplers upside down, if you have 2 samplers each user will always run 1st sampler then it will run 2nd sampler.
You can use __threadNum() function and ${__jm__Thread Group__idx} pre-defined variable in order to verify that the execution order is sequential.
If you want all the users to execute first sampler then all users to execute the second sampler - go for Synchronizing Timer
If you want to get to the reason of the failure try saving the responses using i.e. Simple Data Writer as it might be the case your "first" API fails silently and hence your correlation doesn't extract the value.
I need write the following scenario in JMeter
Login via http request and in parallel sending calls for 8 hours.
After that running in parallel Login and Logoff and sending calls again for 8 hours
After that running in parallel Login and Logoff and sending calls again for 8 hours
After that running in parallel Login and Logoff and sending calls again for 8 hours
and after N runs … start everything from beginning.
I created N thread groups , and added parallel controller , and under the parallel controller i added the loop controller of Login , Logout, sending calls
it didn't worked , the test stops after running the first run of thread group, it doesn't run as duration time .
what i m doing wrong , maybe i have to write the test plan different?
We cannot say anything meaningful without seeing your Thread Group configuration, for now I can only state that your test will end when:
the last user finishes the last iteration specified in the Loop Count
the test duration exceeds the "Duration"
whatever comes the first.
So make sure to tick "Infinite" box and specify the desired duration of your test plan
Also be aware that according to the How to Use the Parallel Controller in JMeter the Parallel Controller runs its children in parallel. Once. The main use case for the parallel controller is simulating AJAX requests to bypass JMeter's limitation of "one virtual user = one thread", maybe for your test scenario it makes sense to increase the number of threads in the Thread Group instead of going for Parallel Controller.
And last but not the least, be aware of the Runtime Controller which executes its children for the specified duration.
I'm a newcomer to Jmeter and want to be able to run some setup requests once only, in which some variables are setup, before I then run a set of further requests for as many users as I set in the Number of Users Thread Group. These users are passed the variables created in the Once Only Controller.
I've inherited a script as follows, using a Once Only Controller:
If I set the Number of Threads as 10 to ramp up to 10 in one second and run for one minute, I expect the number of Samples (requests) made in the Once Only Controller to show as 1. I only want these requests to run once then subsequent requests to use the setup data.
Why then, when I run, do I see the samples as 10 in the requests that are set in the Once Only Controller:
Bear in mind there may be some fundamental misunderstandings given my I'm a newcomer to Jmeter.
I found the setUp Thread Group Controller which seems to be what I need. However, this does not seem to pass variables extracted using the JSON extractor into the next Thread Group 'Load Test'
Thanks
Use Once Only Controller for running specific samplers for every thread
The Once Only Logic Controller tells JMeter to process the controller(s) inside it only once per Thread
You can add samplers to setUp Thread Group so it'll be executed once before test
execute before the test proceeds to the executing of regular Thread Groups.
Note keep its default (especially Number of Threads = 1)
As per Once Only Controller documentation:
The Once Only Logic Controller tells JMeter to process the controller(s) inside it only once per Thread, and pass over any requests under it during further iterations through the test plan.
So each your Thread will execute Once Only Controller's children only once, no matter how many loops your thread group will have.
As you have 10 threads each of 10 threads will execute the requests once.
If you want to execute the request by only one thread, no matter how many requests are in the Thread Group - I would recommend going for If Controller instead
Substitute Once Only Controller with an If Controller
Use the following condition:
${__groovy(ctx.getThreadNum() == 0 && vars.getIteration() == 1,)}
I have a thread group with 2 http requests, the first one is for the user to log in and have two regular expression extractor so I can extract the credentials.
the second http request should use those credentials in the header.
This is all working except that jmeter is executing all login requests, and after that executes the second request.
I was expecting the login request to execute and after that the second request, and then repeat the whole thing.
Any sugestion?
If you just want to repeat your test flow set in Thread Group
Each thread will execute the test plan in its entirety and completely independently of other test threads. Multiple threads are used to simulate concurrent connections to your server application.
Number of Threads = 1 and Loop Count with the number of times you want to repeat.
This way you will execute the samplers sequentially.
If you set Number of Threads above 1 it will execute test flows in parallel, if you need it you will have to use Synchronizing Timer.
The purpose of the SyncTimer is to block threads until X number of threads have been blocked, and then they are all released at once.