Difference between Start Next Thread Loop and Stop Thread in JMeter - jmeter

There is a Test plan in with set of related requests. If first request fails then I need skip subsequent request as they will anyways fail. How can I achieve this in JMeter.
Test Plan
ThreadGroup(Number of threads:2)
Request1
Request2
Request3
Request4
For example: If Request1 fails due to some error then thread should not execute Request2, Request3, Request4. as Request2,3 & 4 use token from request1 and it will anyways fail if request fails. Can it be achieved using Start Next Thread Loop and Stop Thread. what is the different between these two options

Each JMeter thread (virtual user) you define in the Thread Group executes Samplers upside down.
When there are no more Samplers to execute or loops to iterate - the thread is being shut down. When there are no more running threads - the test will fail.
Start Next Thread Loop - ignore the error, start next loop and continue with the test, so if Request1 fails - JMeter will simply go to the next iteration of the Thread Group and will try to execute Request 1 one more time until it will be successful. The failure will be recorded in the .jtl results file
Stop Thread - current thread exits, it means that the current thread will be shut down and won't execute anything. The failure will be recorded in the .jtl results file
Another option is use If Controller with ${JMeterThread.last_sample_ok} pre-defined variable as the condition, if you design your test plan like this:
the Request2 will only be executed only if Request1 is successful

Related

How can i make jmeter run all thread group before repeat?

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.

In JMeter, how to allow multiple threads to upload files concurrently

I have written a simple test plan with the following steps
Test Plan
View Results in Table
Aggregate Report
Thread group
Threads: 5
Ramp-up period: 0s
Loop count: 1
Inside Thread Group
A dummy sampler to prove that all threads are running concurrently
HTTP request to upload a file
When I run the above tests, the dummy sampler is executed nearly the same time. However, I realize that only 1 thread can execute the HTTP request to upload file at a time, even when I have multiple threads. So the final result will be Thread 1 upload file -> finish -> Thread 2 upload file ... e.t.c.
Is this a normal behaviour and can I make file upload performs concurrently from multiple threads?
It depends on the number of threads, loop count and ramp-up period. JMeter starts threads within the time frame you specify in "Ramp-up period" input and the threads start executing samplers upside down (or according to the Logic Controllers). When there are no samplers to execute or loops to iterate the thread is being shut down.
If you need to configure JMeter to execute a certain request at exactly the same time by several threads add Synchronizing Timer as a child of this request and configure "Number of Simulated Users to Group by" setting to match the number of simultaneous users
Example execution:
As you can see, Dummy Samplers were started in 2 seconds while HTTP Request samplers were executed at nearly the same moment.
See Using the JMeter Synchronizing Timer article for more information on implementing these "rendezvous points" in JMeter tests

Running sampler of jmeter in isolation

Suppose my threads are 30 and iteration count is 1 and I have samplers such as:
sampler1
sampler2
sampler3
....
sampler10
Whenever I run the test plan with corresponding ramp up period some of my samplers are being executed concurrently I meant user 1 is executing sampler1 and also user 20 is executing same sampler which is absolutely fine but I want sampler3 to be executed in isolation i.e. when that sampler is being executed by someone no other user should try to access it.
Is there any way?
I am using Jmeter.
Thanks in advance
As per Using the HTTP Cookie Manager guide you can put your Sampler 3 under Once Only Controller
From 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.

JMeter Include controller

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

Executing only one request out of 20 request from a thread - need to execute all request based on conditional statements

I have 5 threads and each having multiple request (nearly 50).
When I start to execute all threads every thread running fine with all requests but only one thread (Thread3) not executing all required requests.
All my requests are executing through some conditional statement (ex: If TC1=TRUE --> execute).
In Thread 3 all conditions are correctly defined but always running only one request and others are not running, even not throwing any exception/error.
In jmeter log file there is also no exceptions/errors.
All requests (XML) also look to be executed fine.
Is there any way to find why threads are not running in jmeter?

Resources