title: PrimeFaces FileUpload Filter ClassNotFound Exception
body: <p>I am getting an error while running a JSF project. Here is the error log;</p>
  
  <pre><code>org.apache.catalina.core.StandardContext filterStart
  SEVERE: Exception starting filter PrimeFaces FileUpload Filter
  java.lang.ClassNotFoundException: org.primefaces.webapp.filter.FileUploadFilter
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
      at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:527)
      at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:509)
      at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:137)
      at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)
      at org.apache.catalina.core.ApplicationFilterConfig.&lt;init&gt;(ApplicationFilterConfig.java:107)
      at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4775)
      at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5452)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
      at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
      at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
      at java.util.concurrent.FutureTask.run(FutureTask.java:166)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
      at java.lang.Thread.run(Thread.java:724)
  
  org.apache.catalina.core.StandardContext startInternal
  SEVERE: Error filterStart
  org.apache.catalina.core.StandardContext startInternal
  SEVERE: Context [/Project] startup failed due to previous errors
  </code></pre>
  
  <p>I've already created a user library added commons-fileupload-1.3.jar and commons-io-2.4.jar files but I'm still gettin the error. Any ideas?</p>