java.util.gleichzeitige.ExecutionException: org.apache.catalina.LifecycleException: Fehler beim starten

Wenn ich versuche zu laufen mein Projekt, es zeigt, diese Art von Fehler.

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/Temp]]
  at java.util.concurrent.FutureTask.report(Unknown Source)
  at java.util.concurrent.FutureTask.get(Unknown Source)
  at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939)
  at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
  at java.util.concurrent.FutureTask.run(Unknown Source)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)  
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
  at java.lang.Thread.run(Unknown Source) 
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/Temp]]
  at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:441)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
  ... 6 more 
Caused by: java.lang.IllegalArgumentException: The servlets named [MyServlet] and [temp.MyServlet] are both mapped to the url-pattern [/MyServlet] which is not permitted
  at org.apache.tomcat.util.descriptor.web.WebXml.addServletMappingDecoded(WebXml.java:327)
  at org.apache.tomcat.util.descriptor.web.WebXml.addServletMapping(WebXml.java:320)
  at org.apache.catalina.startup.ContextConfig.processAnnotationWebServlet(ContextConfig.java:2389)
  at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2066)
  at org.apache.catalina.startup.ContextConfig.processAnnotationsWebResource(ContextConfig.java:1952)
  at org.apache.catalina.startup.ContextConfig.processAnnotationsWebResource(ContextConfig.java:1946)
  at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1153)
  at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:775)
  at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:299)
  at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
  at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5077)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  ... 6 more

Dec 12, 2016 12:53:47 PM org.apache.catalina.core.ContainerBase startInternal SEVERE: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: A child container failed during start  at java.util.concurrent.FutureTask.report(Unknown Source) 
  at java.util.concurrent.FutureTask.get(Unknown Source)
  at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939)
  at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.startup.Catalina.start(Catalina.java:655) 
  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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355)
  at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495) Caused by: org.apache.catalina.LifecycleException: A child container failed during start
  at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:948)
  at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
  at java.util.concurrent.FutureTask.run(Unknown Source)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)  
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
  at java.lang.Thread.run(Unknown Source)

Dec 12, 2016 12:53:47 PM org.apache.catalina.startup.Catalina start SEVERE: The required Server component failed to start so Tomcat is unable to start. org.apache.catalina.LifecycleException: A child container failed during start  
  at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:948)
  at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.startup.Catalina.start(Catalina.java:655) 
  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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355)
  at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495)

IDE: Ecilpse-neon
server:Tomcat v9.0
Java: 1.8.0 ( in Tomcat auch)
Hinzugefügt jar:
- catalina-4.1.31
- catalina-ant-6.0.37
- catalina-ha-6.0.13
- catalina-Stämme
- javax.servlet-3.0
- servlet-api-2.5-6.1 h.6

MyServlet.java

//@WebServlet("/MyServlet")
public class MyServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * Default constructor. 
     */
    public MyServlet() {
        //TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //TODO Auto-generated method stub
        PrintWriter out = response.getWriter();
        out.print("Hello..............");
        response.getWriter().append("Served at: ").append(request.getContextPath());
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //TODO Auto-generated method stub
        doGet(request, response);
    }

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>Temp</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>

  <servlet>
  <servlet-name>MyServlet</servlet-name>
  <servlet-class>temp.MyServlet</servlet-class>

  </servlet>
  <servlet-mapping>
  <servlet-name>MyServlet</servlet-name>
  <url-pattern>/MyServlet</url-pattern>
  </servlet-mapping>
</web-app>

}

Wie Kann ich das lösen dieser Fehler?

The servlets named [MyServlet] and [temp.MyServlet] are both mapped to the url-pattern [/MyServlet] which is not permitted -- Bedeutet das, dass nichts für Sie?
Wie die Fehlermeldung nahelegt, Sie habe 2 servlets mit dem gleichen URL-mapping. Postleitzahl für MyServlet und temp.Myservlet

InformationsquelleAutor demo demo | 2016-12-12

1

In meinem Szenario, ich bin mit @WebServlet Annotation und gleichen url-pattern-Mappings für zwei verschiedene servlet -, nach dem ändern des url-pattern-servlet, Tomcat erfolgreich gestartet für mich 🙂

InformationsquelleAutor Hardik Patel
0

Ich habe java.lang.IllegalArgumentException: Die servlets mit dem Namen [X] und [Y] sind beide abgebildet, um die url-Muster [/url], das ist nicht erlaubt dies und es funktioniert!!!!!!!!

Scheint es, dass Sie gemischte @WebServlet annotation basiert und web.xml
basierte Konfiguration.

Ich bezweifle, dass Sie ein Servlet, das mithilfe der "Servlet Erstellen" - Assistenten
das schafft web.xml Eintrag mit url-pattern und dann Hinzugefügt
@WebServlet annotation, die Duplikate alles, was Sie setzen in der
web.xml.

Sollten Sie die eine oder die andere, nicht beide. Entfernen Sie die Zuordnung von
web.xml und go ahead mit der Verwendung von nur der @WebServlet annotation.

InformationsquelleAutor demo demo
-2

Er arbeitete nach, als ich entfernt haben @WebServlet annotation von meinem Myservlet.java.Aber ich kann nicht verstehen, warum es nicht funktioniert hat mit @WebServlet
- Dies ist nicht die richtige Lösung. Überprüfen Sie die Kommentare und veröffentlichen Sie Ihren code.
- ja,habe ich geschrieben MyServlet und web.xml
InformationsquelleAutor demo demo

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