java.lang.Error: Unresolved compilation problem:

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Prime Community Forum • View topic - PrimeFaces Sample on GAE - Not working

Unresolved compilation problem:

java.lang.Error: Unresolved compilation problem: 	at com.sun.faces.config.WebConfiguration.getInstance(WebConfiguration.java:172)	at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:158)	at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548)	at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)	at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)	at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)	at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)	at org.mortbay.jetty.Server.doStart(Server.java:224)	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)	at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:185)	at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:147)	at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:219)	at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:164)	at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)	at com.google.appengine.tools.development.DevAppServerMain.(DevAppServerMain.java:113)	at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:89)