title: JMeter - Non HTTP response message: URI can't be null
body: <p>I need to test a web login using jmeter but this is the response in the results tree:</p>
  
  <pre><code>Thread Name: Thread Group 1-1
  Sample Start: 1970-01-01 05:30:00 IST
  Load time: 0
  Latency: 0
  Size in bytes: 1089
  Headers size in bytes: 0
  Body size in bytes: 1089
  Sample Count: 1
  Error Count: 1
  Response code: Non HTTP response code: java.lang.IllegalArgumentException
  Response message: Non HTTP response message: URI can't be null.
  </code></pre>
  
  <p>Response headers:</p>
  
  <pre><code>HTTPSampleResult fields:
  ContentType: 
  DataEncoding: null
  </code></pre>
  
  <p>can someone please help me?</p>