HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Servlet.init() for servlet zkLoader threw exception
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
	org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:550)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:380)
	org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
	org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
	org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166)
	org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:288)
	java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	java.lang.Thread.run(Thread.java:662)
root cause

java.lang.NoClassDefFoundError: org/zkoss/web/servlet/Servlets$BrowserIdentifier
	org.zkoss.zk.ui.http.DHtmlLayoutServlet.init(DHtmlLayoutServlet.java:105)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
	org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:550)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:380)
	org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
	org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
	org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166)
	org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:288)
	java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	java.lang.Thread.run(Thread.java:662)
root cause

java.lang.ClassNotFoundException: org.zkoss.web.servlet.Servlets$BrowserIdentifier
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1643)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1488)
	org.zkoss.zk.ui.http.DHtmlLayoutServlet.init(DHtmlLayoutServlet.java:105)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
	org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:550)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:380)
	org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
	org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
	org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166)
	org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:288)
	java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	java.lang.Thread.run(Thread.java:662)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.6 logs.

Apache Tomcat/7.0.6