title: Servlet Exception - getOutputStream() has already been called for this response
body: <p>In my servlet</p>
  
  <p>an exeception thrown as </p>
  
  <pre><code>org.apache.jasper.JasperException: java.lang.IllegalStateException: getOutputStream() has already been called for this response
  </code></pre>
  
  <p>help me to solve this problem </p>
  
  <p>thanks in advance </p>