title: Apache jMeter erroring out with high load requests - java.net.ConnectException: Connection timed out: connect
body: <p>I'm struggling with using jMeter to test my .NET web app.  I'm running jMeter locally against a staging environment in Azure for my app.  Hitting some endpoints, I get: </p>
  
  <pre><code>java.net.ConnectException: Connection timed out: connect
  </code></pre>
  
  <p>Which tells me it's something happening on my end, not caused by my app.  My app shows no errors and is serving requests at this magnitude with ease.  </p>
  
  <p>In this particular test, I have 300 threads with a ramp-up of 10 seconds, repeated 3 times.</p>
  
  <p>What can I do to diagnose further?  Is there some kind of limit being imposed client-side?</p>