I am using the following code in BeanShell postprocessor to stop the current iteration on an error and move to the next iteration. But in my case, I am handling the duration programmatically(infinite while loop and time functions) and not using the thread group loop/duration. So loop count is set to default one at thread group level.
My jmeter script would be -> 3 transaction + whilecontroller(10 transactions).
My error would occur at 5th transaction inside while loop. so i need to stop at that 5th transaction level and start the thread again.
ctx.setTestLogicalAction(org.apache.jmeter.threads.JMeterContext.TestLogicalAction.START_NEXT_ITERATION_OF_CURRENT_LOOP);
So in this case where am not using thread group loop count/duration and using the above code in a Beanshell Postprocessor, it is not moving to next iteration(like stop the current wihle loop run and start from initial). Am I missing something, could someone suggest?
It won't, if the error occurs at 5th iteration - "your" code will proceed to 6th iteration without executing any Samplers which are below the Beanshell PostProcessor. According to interpretation of your description with my very limited level of English I believe you need to use START_NEXT_ITERATION_OF_THREAD action instead.
It's recommended to use JMeter's built-in test elements and avoid scripting where possible. Particular your case can be handled using If Controller and Flow Control Action Sampler combination
If you prefer or have to go for scripting - consider using the most performing language which is Groovy, it's recommended to use JSR223 Test Elements and Groovy language for scripting since JMeter 3.1
Related
I am developing a Test Harness, for which some on here have assisted, so great thanks to you all.
But as part of my Test Harness journey (and stupidity along it) I wanted to know what exactly was being sent when a Thread Group is started, specifically, the ThreadGroup's 'Thread Properties' values for the:
Loop Count: Infinite checkbox
Specify Thread lifetime checkbox
Is it possible to get and manipulate the values of the fields via say JSR223 or Beanshell elements as I would like to manipulate them at runtime?
As of JMeter 5.5 there is no possibility to change these parameters in the runtime
The options are in:
Use JMeter Properties to pass the values from file or command-line arguments when you start the test
Basically the same as point 1 but if you need i.e. more complex calculations you can amend the properties somewhere in setUp Thread Group using suitable JSR223 Test Element (using Beanshell is not generally recommended)
It's also possible to set the "Loop Count" to "Infinite" and "Thread lifetime" to something very big and stop the test using JSR223 Test Element or Flow Control Action sampler if it helps
I currently have a loop that executes a bunch of queries via JDBC request samplers. They should all share a random ID that changes on every loop.
I tried using the beanshell script and JSR223 PreProcessor. But the PreProcessor gets executed before every single JDBC reuqest sampler, not once per loop. I feel like there is an obvious fix to my problem that I am missing.
I also tried putting the JSR223 script into an "Only Once Controller". But then the random variable I inject with vars.put() is not visible to the JDBC sampler. Also, as far as i understand the Only Once Controller, it would only execute on the first loop iteration. Which is not what I want.
JSR223 PreProcessor obeys JMeter Scoping Rules so if you put it to be a child of i.e. q_insert1 sampler - it will be executed only once per iteration.
I would also recommend re-considering language selection, since JMeter 3.1 it's recommended to use Groovy for scripting
My goal is make a beautiful report about my test plan. I'm using about 50 threads and infinite loop so I want get the responses content and make the report. The problem is that the PostProcessor execute every sample request end so I can't put it all together on the same context to use all data and if I use the data every sample ends the results becomes a big mess. I don't found the solution on the web and I'm newbie with Jmeter. So, there are a way to wait all threads ends and get all responses data on 1x time ?
First of all don't use Beanshell, since JMeter 3.1 you should switch to JSR223 Test Elements and Groovy language
If you need to collect response data the best option is writing it into a file using i.e. Flexible File Writer and if any post-processing is needed you can perform this using JSR223 Sampler in the tearDown Thread Group
Basically this in a slightly (but meaningfully!) different context. From within a Groovy script being run in jMeter (those are all the details I have at the moment), I need functionality to tell the script what iteration of the test it is currently on.
There are 2 options:
Use vars.getIteration() function
Since JMeter 4.0 you can also get current Thread Group iteration as ${__jm__Thread Group__idx}. From the Groovy script it would be vars.get('__jm__Thread Group__idx)`
I need to read file once and its result to be processed further in sampler.
My strategy is ThreadGroup--> BeanShell Preprocessor + BeanShell Sampler
My preprocessor should read file once for whole Thread Group and result to be used in Sampler for specific no. of thread.(i do not want to read file for each thread)
I wrote file reader code in preprocessor, now need to use the result in sampler.
Don't use the Beanshell PreProcessor as it will be executed by each thread. Use a separate Thread Group with 1 thread to read the values.
Don't use Beanshell Samplers to create the actual load, in case of more or less severe load it will become a bottleneck.
Use JSR223 Test Elements and "groovy" language for scripting - this way you'll be able to get maximum performance from your code.
Now answers:
int number = ctx.getThread().getThreadNum(); // get current thread number
props.put("value_for_thread_" + number, "foo"); // store some value specific for the specific thread
String value = props.get("value_for_thread_5"); // get value for thread 5
Where:
ctx - is a shorthand for JMeterContext
props - stands for JMeter Properties, an instance of java.util.Properties deriving all the methods and fields, global for the whole JVM instance.
See JavaDocs for aforementioned objects to see what else can be done and Beanshell vs JSR223 vs Java JMeter Scripting: The Performance-Off You've Been Waiting For! guide for instructions on installing groovy scripting engine, scripting best practices and benchmark of Beanshell, JSR223+groovy and Java code.
Use Jmeter variables to store the values you've read, and then use them in subsequent steps. Please note that the pre-processor will run every time your thread loop is executed.
In your beanshell preprocessor, you can store a variable like this:
vars.put("name","value")
and then access it later either as
vars.get("name")
in beanshell, or as ${name} in fields of any other sampler.
Please note that if your preprocessor is part of your main thread group, it will be run every time your thread loops. If this is an expensive operation or values do not change during the run, you might want to use a setup thread group.