In Jmeter, I have a thread group with 20 http sampler, added HTTP Cookie manager and session is been handled through JSESSIONID.
When I run a script for multiple users with > 10 threads, the first few threads are running properly, thereafter some HTTP samplers of other threads are failed with an error (on the web page): "Your Session is logged out. Please close current window and try login to the application once again."
When I did further analysis, different JSESSIONIDs are passed in between within the same thread.
Please have a look on how a different session id passed for the samplers in same threads and provide a solution for this.
Note: When I run this for a minimal number of users like 2, I don't get this issue.
Two options available
If you are using URL redirects And come back to main url,you may get different jsessionid And its depend on your server configuration you have,you need to use proper regular expression to extract the session and to bind in next call
If you are using same credentials for various threads And if your server config don't have the capability to manage it you may get various jsessionid
Related
My case is-
I have to login in a website and then have to fecth a data.
For that I have created one thread group and created two HTTP request , one for login and one to fetch data.
But I want login HTTP request to HIt one time and data fetching to hit for many Virtual users.
But There is one common thread group for both.
Please help How I can sort out this?
If you need to run all requests after login in parallel, you may use Parallel Controller plugin:
Install JMeter Plugin Manager: Download plugins-manager.jar and put it into lib/ext directory, then restart JMeter.
Open menu Options -> Plugins Manager
Install Parallel Controller & Sampler plugin.
Add the Parallel Controller to the Test Plan: Right click on Thread Group -> Add -> Logic Controller -> bzm - Parallel Controller
Add your request samplers inside Parallel Controller.
Choose your Thread Group and set the number of threads (users) and loop count.
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.
So, if you want to run login sampler just once, set:
Number of Threads (users) to 1
Loop Count to 1
There are also different types of Thread Groups. Check official documentation for more information
JMeter threads (virtual users) are totally independent from each other, they use Thread Local Storage pattern for storing session information and variables therefore if you login with one user - it will be able to fetch the data, the second user will not be able to fetch the data if he isn't logged in.
If you're absolutely sure that you want to share the same login session across multiple virtual users and perform login only once consider the following test setup:
setUp Thread Group with 1 virtual user and 1 loop to perform login
Inter-Thread Communication Plugin to store the session information (i.e. Cookies) and pass it to the normal Thread Group
Normal Thread Group with as many users as you need using the data from the setUp Thread Group
Check out SynchronizationPluginsExample.jmx test plan for reference implementation.
I am load testing against a Registration system. I currently have a JMeter script that pulls user information from a CSV file (CSV Data Set Config) and my Thread Group has the following steps:
Contact CAS server, get login ticket
Login to CAS
Execute tasks in Registration system
Logout of CAS
JMeter runs through each of those steps as a separate thread and the script works.
The problem is that our test isn't quite accurate when compared against the behavior of our users in real life. Like I mentioned, this is a Registration system, and our end users are logging in and authenticating (via CAS) minutes before they actually begin hammering the actual system (when Registration opens at midnight - and the floodgates open).
In real life we never have problems with our CAS authentication system because we don't have thousands of users authenticating at once. When we do our load testing with JMeter the first two steps are to authenticate via CAS, and this makes CAS a bottleneck and it begins to fail when we load test with 500 users over a span of 10 seconds. As such, our load testing transactions aren't able to hit the actual Registration system and the JMeter load test isn't valid.
Is there a way to update a JMeter script to log all users in first (loop through the first two steps and maintain the CAS session info for all users), and then perform the rest of the steps?
Stirling,
Please use 'Synchronizing Timer' element of the JMeter that will wait for all the users to login and then move forward to the next step (Registration System).
You can create your script in following structure:
HTTP Request for Contact CAS server, get login ticket
HTTP Request for Login to CAS
Synchronizing Timer [Set the 'Number of Simulated Users to Group by' to 0 and Timeout based on your requirement [Recommended value to set is '300000' i.e 5 minutes]. Do not set Timeout to '0' otherwise your test will remain in running state forever if any of the users gets failed in the previous step]
HTTP Request for Execute tasks in Registration system
HTTP Request for Logout of CAS
When the test completes 'HTTP Request for Login to CAS' step then it will wait for all the users to reach at that step before moving to 'HTTP Request for Execute tasks in Registration system' step.
If you need information related to other JMeter elements then you can refer to JMeter knowledge base to get all the critical information at one place.
Kindly let me know if you have any questions.
I have a django application to be tested using Jmeter. Here is the Workflow
Admin user logs in , gets back access_token
Creates a user, using access_token ,unique mobile and email
Created User resets its password using OTP and a new password
Created user logs into the application.
I am using Reg Ex. extractor for accessing access_token and OTP
I am able to perform this with 5 threads, but as I increase the threads, it fails. Let me know what am I missing. Below is the screen shot Of My Jmeter.
It is not clear what exactly fails. Whole JMeter test? Some specific sampler? Your application? How many users do you add, is it 6 or 600? You need to be more specific and include at least essential failure details.
In the meantime I would suggest the following troubleshooting options:
Add HTTP Cookie Manager to your Test Plan. Given you use > 1 user you need to maintain a separate session for each login.
You need to use a separate admin account for each thread. If you have only one admin account - create users in loop using Loop Controller as your test needs to be realistic.
Run your test in command-line non-GUI mode
Disable all the listeners during test run as they consume a lot of resources (especially View Results Tree one) therefore your test may simply fail due to lack of RAM, see Greedy Listeners - Memory Leeches of Performance Testing for detailed explanation.
My application is live application & three is a heavy use of AAJX call and Java scripts.
Successful login required three steps
Login validation
On login page browser post user login information and backed first validate it and set cookies & session id for further use.
After successfully validation of user information browser initiate two request parallel towards back-end.
Browser post a request to server & server send some XML data in every 10 seconds towards browser. Back-end push information in every 10 seconds up to user logged in.
Also browser post a ping request to server to make sure user is available and active.
To test the performance of UI by JMeter I am planning to create following test plan.
Test Plan
Main Login Thread
Ping Thread
Application Thread
Now I want to run thread 2 & 3 parallel after completion of first thread.
Please let me know if this is possible in JMeter if Yes how I can run two threads parallel after completion of first.
It isn't something which is provided in JMeter out-of-the-box as currently there is no way to jump over the number of threads which are defined on Thread Group level so you'll need to do some coding in order to work it around, i.e.:
Use JSR223 Sampler (or PostProcessor)
Develop custom sampler i.e. basing on ExampleSampler which spawns more threads in order to simulate AJAX parallel calls
See How to Load Test AJAX/XHR Enabled Sites With JMeter article for more details and some reference implementation examples.
I have created a Thread Group which has Firefox Driver Config , a Web driver Sampler and a View Results Tree Listener.
I have also added CSV Data set Config and passing username and Passwords through it to the application.
I have around 10 Credentials.
The scenario i want to do is, I want all the 10 users to login at the same time i.e 10 instances of the firefox browser to be invoked and do the job. i have given 10 in the thread group, but the users login 1 after the other.
Basically i am doing a performance testing, So i need all the 10 users to login at the same time(Simultaneously). So that 10 instances of firefox can be invoked at the same time.
Can anyone tell me, how can i achieve this in Jmeter?
Just add Synchronizing Timer to your test plan, if you need to test simultaneous login - put the timer as a child of login webdriver sampler.
I assume that you aware of recommendations from WebDriver Sampler Tutorial like
It is NOT the intention of this project to replace the HTTP Samplers included in JMeter. Rather it is meant to compliment them by measuring the end user load time.
and
JMeter allows the creation of multiple threads, and each thread is responsible for creating load on the server. However, for the Web Driver use case, the reader should be prudent in the number of threads they will create as each thread will have a single browser instance associated with it. Each browser consumes a significant amount of resources, and a limit should be placed on how many browsers the reader should create.
So it is recommended to create main load using JMeter's HTTP Request samplers and using one thread executing WebDriver Sampler to measure real-life user experience. If you still intend to create the main load with the WebDriver Sampler remember that browsers are resource-intensive so you'll need to provide something like 1 core and 1 Gb of RAM to each browser instance so make sure that machine(s) running JMeter have some capacity.