title: Cannot use primefaces extensions with Liferay 6.2
body: <p>I'm trying to use the <a href="https://www.versioneye.com/java/org.primefaces.extensions:primefaces-extensions/1.2.1" rel="nofollow">Primefaces-Extensions</a> library in a Liferay JSF Portlet that is already using primefaces 4.0.</p>
  
  <p>When I include any <code>pe</code> component, e.g a <code>&lt;pe:timer&gt;</code>, I get this error:</p>
  
  <pre><code>javax.faces.view.facelets.TagException: /html/editDoc/myProjects.xhtml @32,39 &lt;pe:timer&gt; Tag Library supports namespace: http://primefaces.org/ui/extensions, but no tag was defined for name: timer
  at com.sun.faces.facelets.compiler.CompilationManager.pushTag(CompilationManager.java:304)
  at com.sun.faces.facelets.compiler.SAXCompiler$CompilationHandler.startElement(SAXCompiler.java:255)
  at com.sun.faces.facelets.compiler.SAXCompiler.doCompile(SAXCompiler.java:423)
  at com.sun.faces.facelets.compiler.SAXCompiler.doCompile(SAXCompiler.java:399)
  at com.sun.faces.facelets.compiler.Compiler.compile(Compiler.java:124)
  </code></pre>
  
  <p>The only component I've managed to use without crashing is pe:ckEditor, which is however rendering as an inputTextarea (no toolbox etc)</p>
  
  <p>I probably did something wrong setting up the primefaces-extensions library, but I don't know where to look.</p>
  
  <p>I'm using:
  Liferay 6.2.2 ce
  primefaces 4.0
  primefaces-extensions 1.2.1 (I guess this is the proper version to work with pf 4.0)</p>
  
  <p>About the steps I followed: (I had a perfectly working pf 4.0 setup)</p>
  
  <ul>
  <li><p>Added libs in <code>[portlet docroot]/WEB-INF/lib/</code> :</p>
  
  <ul>
  <li>primefaces-extensions-1.2.1.jar </li>
  <li>resources-ckeditor-1.2.1.jar</li>
  <li>commons-lang3-3.1.jar</li>
  <li>gson-2.2.4.jar</li>
  </ul></li>
  <li><p>Added <code>xmlns:pe="http://primefaces.org/ui/extensions</code> in xhtml file's namespaces</p></li>
  </ul>