CODEWITHSUNDEEP
loggingfile-iojmeter
user2997497
user2997497

Reputation: 160

JMeter add variable to Simple Data Writer record

For purpose of better understanding/analyzing JMeter logs I'd like to add loop count to Simple Data Writer log record. I could have an loop count variable easily, but how to add variable value to Simple Data Writer record?

E.g. in my JMeter test I have 50 users, which e.g. ramping up slowly like each 5 mins new user. And my threadgroup is configured to loop forever during test run. So I have SDW records like:

1447625139724,20,157 /Start.aspx,200,OK,Thread Group - Dashboard 50 1-1,text,true,3418,1,1,6,0,0
...
1447625158283,42,171 /Logout.aspx,200,OK,Thread Group - Dashboard 50 1-1,text,true,6814,1,1,32,0,0
1447625160283,13,157 /Start.aspx,200,OK,Thread Group - Dashboard 50 1-1,text,true,3419,1,1,4,0,0
...
...
1447625201195,1023,160 /Start.aspx,200,OK,Thread Group - Dashboard 50 1-2,text,true,24038,2,2,29,0,0
...

So at the end I have 50 threads running. And withing each thread users login - do things - logout - log back in ...

What I would like to see in log file is not only "Thread Group - Dashboard 50 1-2" but something like "Thread Group - Dashboard 50 1-2-15" where 15 would mean 15th loop for thread 2 in thread group 1.

I know I can make a counter variable and increment it e.g. each /Start call. But how do I write value of that variable with each Simple Data Writer record? That is the question!

Thank you.

Upvotes: 0

Views: 3001

Answers (2)

Dmitri T
Dmitri T

Reputation: 168217

Use JMeter's sample_variables property:

  1. Add the following line to user.properties file (located under /bin folder of your JMeter installation)

    sample_variables=counter,threadGroup,etc.
  2. On next JMeter restart defined variables values (if any) will be added to .jtl results file.

You can also provide this property via -J command line argument like:

jmeter -Jsample_variables=foo,bar -n -t testplan.jmx -l results.jtl

See Apache JMeter Properties Customization Guide for some extra information on the domain.

Upvotes: 1

RaGe
RaGe

Reputation: 23805

Add a beanshell element to your test, preprocessor, postprocessor or sampler, doesn't really matter and add a log line to it, to write to JMeter log.

log.info("Hello World!");

You can write values of variables and jmeter properties to log as well. You can get a lot of run time information from JMeter context

log.info(ctx.getThreadNum() + "-" + vars.get("LoopCounterVariable"));

LoopCounterVariable can be your own variable that you're updating, or you can add a JMeter counter to your test plan.

Upvotes: 0

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