HTTP Status 500 – Internal Server Error


Type Exception Report

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

java.lang.NullPointerException
	org.zkoss.chart.demo.MainLayoutComposer.getVisitedUrls(MainLayoutComposer.java:505)
	org.zkoss.chart.demo.MainLayoutComposer.initSidebar(MainLayoutComposer.java:130)
	org.zkoss.chart.demo.MainLayoutComposer.doAfterCompose(MainLayoutComposer.java:108)
	org.zkoss.chart.demo.MainLayoutComposer.doAfterCompose(MainLayoutComposer.java:66)
	org.zkoss.zk.ui.impl.UiEngineImpl.doAfterCompose(UiEngineImpl.java:619)
	org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:944)
	org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:891)
	org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:778)
	org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:838)
	org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:796)
	org.zkoss.zk.ui.impl.UiEngineImpl.execCreate(UiEngineImpl.java:742)
	org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:463)
	org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:371)
	org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:220)
	org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:146)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.zkoss.chart.demo.DemoEntryServiceFilter.doFilter(DemoEntryServiceFilter.java:53)

Note The full stack trace of the root cause is available in the server logs.


Apache Tomcat