title: SEVERE: Error filterStart ++++ SEVERE: Exception starting filter SessionFilter
body: <p>When im trying to build my dynamic web project the following logs are coming up and im not sure how to resolve this issue..any help??</p>
  
  <p>catalina.2013-09-26.logs</p>
  
  <pre><code>SEVERE: Error filterStart
  Sep 26, 2013 4:32:47 PM org.apache.catalina.core.StandardContext s.2013tart
  SEVERE: Context [/iaf] startup failed due to previous errors
  </code></pre>
  
  <p>localhost.2013-09-26.logs</p>
  
  <pre><code>Sep 26, 2013 4:32:47 PM org.apache.catalina.core.StandardContext filterStart
  
  
  SEVERE: Exception starting filter SessionFilter
  java.lang.ClassNotFoundException: sevices.authentication.SessionFilter
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
      at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:249)
      at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)
      at org.apache.catalina.core.ApplicationFilterConfig.&lt;init&gt;(ApplicationFilterConfig.java:108)
      at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3709)
      at org.apache.catalina.core.StandardContext.start(StandardContext.java:4363)
      at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
      at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
      at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
      at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:830)
      at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:719)
      at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490)
      at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1217)
      at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:293)
      at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
      at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)
      at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
      at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
      at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
      at java.lang.Thread.run(Thread.java:679)
  </code></pre>