title: GlassFish Http Status 500 - Internal Server Error
body: <p>When I try to run my Web Application (a basic CRUD) using JSP, the GlassFish server returns the follow message:</p>
  
  <p>HTTP Status 500 - Internal Server Error</p>
  
  <p><strong>type</strong> Exception report</p>
  
  <p><strong>message</strong> Internal Server Error</p>
  
  <p><strong>description</strong> The server encountered an internal error that prevented it from fulfilling this request.</p>
  
  <p><strong>exception</strong></p>
  
  <p>java.lang.NullPointerException</p>
  
  <p><strong>note</strong> The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 4.1 logs.</p>
  
  <p>And I don't knhow what to do. I think the error is in connection with my DB. I'm using PostgreSQL, running in a Windows.</p>
  
  <p>My NetBeans project is in GitHub <a href="https://github.com/rflpazini/Crisfa" rel="nofollow">Crisfa Project</a></p>