title: Non HTTP response code: java.net.UnknownHostException in JMeter
body: <p>I am trying to do load testing using JMeter for the first time.
  I am trying to access URL : <a href="http://ss12345.localhost:9001/testManagement/login" rel="nofollow noreferrer">http://ss12345.localhost:9001/testManagement/login</a>.
  The Sampler Result Printed as : </p>
  
  <pre><code>Thread Name:Thread Group 1-1
  Sample Start:2020-04-02 18:25:52 IST
  Load time:21
  Connect Time:21
  Latency:0
  Size in bytes:2490
  Sent bytes:0
  Headers size in bytes:0
  Body size in bytes:2490
  Sample Count:1
  Error Count:1
  Data type ("text"|"bin"|""):text
  Response code:Non HTTP response code: java.net.UnknownHostException
  Response message:Non HTTP response message: ss12345.localhost
  
  
  HTTPSampleResult fields:
  ContentType: 
  DataEncoding: null
  </code></pre>
  
  <p>I do not understand why it is not picking the <code>userSpecificSubDomain : ss12345</code>.
  If I do not specify userSpecificSubDomain then it opens the Login Page otherwise it throws the Non HTTP response code: java.net.UnknownHostException.
  <em>For more details, refer to the below images.</em></p>
  
  <p><a href="https://i.stack.imgur.com/QSZdE.png" rel="nofollow noreferrer">Image 1 </a></p>
  
  <p><a href="https://i.stack.imgur.com/Tmqbv.png" rel="nofollow noreferrer">Image 2</a></p>