title: Stop JMeter test execution only after n assertion errors
body: <h2>Problem</h2>
  <p>I am modelling stress tests in JMeter 2.13. My idea of it is to stop the test after certain response time cap is reached, which I test with Duration Assertion node.</p>
  <p>I do not want, however, to stop the test execution after first such fail - it could be a single event in otherwise stable situation. I would like the execution to fail after <strong>n</strong> such assertion errors, so I can be relatively sure the system got stressed and the average response should be around what I defined as a cap, which is where I want to stop the whole thing.</p>
  <h2>What I tried</h2>
  <p>I am using Stepping Thread Group from JMeter plugins. There I could use a checkbox to stop the test after an error, but it does that on first occasion. I found no other node in documentation that could model it, so I'm guessing there's a workaround I'm not seeing right now.</p>