title: JMeter : java.net.NoRouteToHostException: Cannot assign requested address (Address not available)
body: <p>I have created a simple Spring boot Application having a HelloController.</p>
  
  <pre><code>Get API: http://localhost:8080/hello
  Response: Hello World 
  </code></pre>
  
  <p>Now I have created a JMeter Script having 0.1 million concurrent users hitting the above get API.
  When I run the JMeter Script, after 30k count, I start getting the error:</p>
  
  <pre><code>java.net.NoRouteToHostException: Cannot assign requested address (Address not available)
  </code></pre>
  
  <p>What is the reason for this? How can I resolve this issue?</p>
  
  <ul>
  <li>I'm using UBUNTU 18.04 with 8gb RAM.</li>
  <li>While performing the operation, only JMeter and STS was open.</li>
  </ul>