I have an requirement of creating test plan in jmeter
User 1 ==> 10 threads ==> 1st thread login into a GUI and edit 1st line , 2nd thread will edit 2nd line and so on till 5th thread for 5th line again same scenario continues till it reaches 10 thread.
How do we use CSV or parameterized concept to answer above use case?
There is no need to use any external parameterization like CSV files for this.
JMeter provides __threadNum() function which returns the current thread (virtual user) number so if you want 1st user to edit the 1st line - just use ${__threadNum} function in the place where you need to provide the line number and that would be it.
More information on JMeter Functions concept: Apache JMeter Functions - An Introduction
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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 am writing a JMeter webdriver test for 8 concurrent users.
In my test, I created a CSV Data Set Config with 10 logins.
I have noticed that JMeter is reusing the same login for at least 2 users.
This causes an issue where the 2 logins are trying to do the same task and one of them will fail waiting for specific elements to appear.
Is there a way to force JMeter to always use an unique login per user?
It depends on the nature of your test and how you set up the CSV Data Set Config.
If you set "Sharing Mode" to All Threads - each thread will be reading new value on each iteration:
however if you will have more than 1 iteration:
1st user will read line # 9
2nd user will read line # 10
3rd user will read line #1
If you want to have "unique" data consider the following approaches:
Using __CSVRead() or __groovy() function to read the data from file, this way you will have control on when to proceed to the next line
Using HTTP Simple Table Server which "READ" endpoint has KEEP=FALSE parameter so once data is used it is removed so no other thread can use it.
I'm using JMeter to test my applications, and I desire to use the same sample N times.
For example, lets say I have 100 different samples how I'll use to test my Login, and want to use these samples 10 times.
I'm using 100 threads, and 10 loops for that.
How I can be sure that the second loop using a sample will start just after that the first loop of that sample has finished (and not have the same sample running simultanious)?
I'm having some troubles to understand how JMeter lead to this scenario.
JMeter acts as follows:
Each thread (virtual users) executes Samplers upside down (or according to the Logic Controllers)
When there are no more Samplers to execute:
-if there is > 1 loop in the Thread Group - the thread starts executing Samplers once again
if there are no more loops to iterate - the thread is being shut down
You can track which thread is executing which sampler by adding __threadNum() function to the sampler name. The Thread Group iteration can be tracked by adding the special JMeter Variable ${__jm__Thread Group__idx}
If you don't want user 1 and user 2 to execute sampler1 at the same time - put this sampler under the Critical Section Controller, but in this case you will not have any concurrency.
I am new to jmeter. Writing script as below:
Thread group1: Token generation
Thread group2: Use token created in Thread group1 and call API.
Need to execute Thread group1 after every 10 mins, so that new token is generated and it is used by Thread group2.
Script structure:
In order to implement a 10 minutes "sleep" Add a Flow Control Action sampler (earlier was Test Action) to 1st Thread Group and configure it to Pause the thread for 600000 milliseconds - 10 minutes
In order to pass token value from one Thread Group into another - use __setProperty() function in 1st thread group to convert JMeter Variable into a JMeter Property and __P() function in 2nd thread group to read the token value.
According to JMeter Best Practices you should always be using the latest JMeter version so consider migrating to JMeter 5.0 (or whatever the latest version available at JMeter Downloads page) as soon as possible.
Below solution worked for me:
In Thread group2 call the API.
Then extract the status code using Regular Expression Extractor.
Add if controller.
NOTE: The only drawback is that, when a request fails then only new token is generated.
First script
Thread-1
|--Http Sampler
|--Include Controller <second script>
Second script
TestPlan
|--Thread-2
| |--Http Sampler
|--Thread-3
|--Http Sampler
I run the first script which does few steps and uses include controller to call the next script. I need the second script Thread groups (Thread-2 and Thread-3) run simultaneously and not consecutively.
I understand the thread run concurrently by default. But when I execute my code i see:
Thread-1 successful
Thread-2 successful
Execution never gets to thread-3
Can you please help me? I want to know how to run the second script's thread group simultaneously?
You are misusing IncludeController, you need to use Test Fragment element in the included test plan (second script)
First and second script are separate test plans.
First Test Plan contains one thread, which contains a include controller to call the second script or the second Test plan
Second test plan contains 2 thread groups
Solution:
In both the Test Plan untick "Run threads consecutively"
In the second test plan tick "Delayed thread creation" - this means that the memory requirements are proportional to the number of concurrent active threads, rather than the total thread count
Threads in JMeter run simultaneously by default.
Understand the difference between concurrency and simultaneous. Here is a helpful link: How to generate Concurrent User load in Jmeter