[2014-07-11 23:25:59,190] ERROR com.google.gerrit.pgm.http.jetty.JettyServer : U                                                                                        nable to instantiate front-end HTTP Filter com.googlesource.gerrit.plugins.githu                                                                                        b.oauth.OAuthFilter
java.lang.ClassNotFoundException: com.googlesource.gerrit.plugins.github.oauth.O                                                                                        AuthFilter
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:190)