WARN:oejw.WebAppContext:Failed startup of context o.e.j.w.WebAppContext{/demo,fi

[qq_39046266]

2017-12-02 18:25:05.849:INFO:oejs.Server:jetty-8.1.10.v20130312
2017-12-02 18:25:10.809:WARN:oejw.WebAppContext:Failed startup of context o.e.j.w.WebAppContext{/demo,file:/D:/IDE/J2EE/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp1/demo/},D:/IDE/J2EE/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp1/demo
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.jetty.webapp.IterativeDescriptorProcessor.visit(IterativeDescriptorProcessor.java:80)
at org.eclipse.jetty.webapp.IterativeDescriptorProcessor.process(IterativeDescriptorProcessor.java:67)
at org.eclipse.jetty.webapp.MetaData.resolve(MetaData.java:332)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1219)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:710)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:454)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at org.eclipse.jetty.server.handler.HandlerCollection.doStart(HandlerCollection.java:229)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:95)
at org.eclipse.jetty.server.Server.doStart(Server.java:280)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at org.eclipse.wst.server.preview.internal.PreviewStarter.run(PreviewStarter.java:72)
at org.eclipse.wst.server.preview.internal.PreviewStarter.main(PreviewStarter.java:29)
Caused by:
java.lang.ClassCastException: org.eclipse.wst.server.preview.internal.WTPErrorHandler cannot be cast to org.eclipse.jetty.servlet.ErrorPageErrorHandler
at org.eclipse.jetty.webapp.StandardDescriptorProcessor.visitErrorPage(StandardDescriptorProcessor.java:1117)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.jetty.webapp.IterativeDescriptorProcessor.visit(IterativeDescriptorProcessor.java:80)
at org.eclipse.jetty.webapp.IterativeDescriptorProcessor.process(IterativeDescriptorProcessor.java:67)
at org.eclipse.jetty.webapp.MetaData.resolve(MetaData.java:332)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1219)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:710)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:454)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at org.eclipse.jetty.server.handler.HandlerCollection.doStart(HandlerCollection.java:229)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:95)
at org.eclipse.jetty.server.Server.doStart(Server.java:280)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at org.eclipse.wst.server.preview.internal.PreviewStarter.run(PreviewStarter.java:72)
at org.eclipse.wst.server.preview.internal.PreviewStarter.main(PreviewStarter.java:29)
2017-12-02 18:25:11.027:INFO:oejs.AbstractConnector:Started SelectChannelConnector@0.0.0.0:8080