JMeter - how to log the full request for a failed response?

Question

i\'m using JMeter command line to stress test our website api. Now, here\'s a sample result i\'m getting back:

Creating summariser 

Created th         


        

Answer 1

I found this thread searching for a solution to log the response only when a sampler fails, so the accepted solution is not good for me. I have occasional sample failures at a very high load involving hundreds of thousands of samples, so a tree listener is completely impractical for me (it will reach several gigabytes in size), so here is what I came up with (which should be good for the OP's scenario as well):

Add a [JSR223 Assertion][1] (should come after all the other assertions) and put the below code in it:

if (Boolean.valueOf(vars.get("DEBUG"))) {
  for (a: SampleResult.getAssertionResults()) {
    if (a.isError() || a.isFailure()) {
      log.error(Thread.currentThread().getName()+": "+SampleLabel+": Assertion failed for response: " + new String((byte[]) ResponseData));
    }
  }
}

This will cause the entire response getting logged to the jmeter log file which is fine in my case, as I know that the responses are really small, but for large responses, more intelligent processing could be done.