java.lang.NullPointerException

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    • java.lang.NullPointerException at java.lang.Class.isAssignableFrom(Native Method) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:256) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685) at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) 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:271) at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:284) at com.google.appengine.tools.development.AutomaticInstanceHolder.startUp(AutomaticInstanceHolder.java:26) at com.google.appengine.tools.development.AbstractModule.startup(AbstractModule.java:87) at com.google.appengine.tools.development.Modules.startup(Modules.java:105) at com.google.appengine.tools.development.devappserver2.DevAppServer2Impl.doStart(DevAppServer2Impl.java:242) at com.google.appengine.tools.development.devappserver2.DevAppServer2Impl.access$000(DevAppServer2Impl.java:56) at com.google.appengine.tools.development.devappserver2.DevAppServer2Impl$1.run(DevAppServer2Impl.java:208) at com.google.appengine.tools.development.devappserver2.DevAppServer2Impl$1.run(DevAppServer2Impl.java:206) at java.security.AccessController.doPrivileged(Native Method) at com.google.appengine.tools.development.devappserver2.DevAppServer2Impl.start(DevAppServer2Impl.java:206) at com.google.appengine.tools.development.devappserver2.StandaloneInstance$StartAction.apply(StandaloneInstance.java:128) at com.google.appengine.tools.development.devappserver2.StandaloneInstance$StartAction.apply(StandaloneInstance.java:82) at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48) at com.google.appengine.tools.development.devappserver2.StandaloneInstance.run(StandaloneInstance.java:66) at com.google.appengine.tools.development.devappserver2.StandaloneInstance.main(StandaloneInstance.java:44)

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