Java tomcat启动失败（Servlet3.0 Web Project）：A child container failed during start

五月 11, 2016 10:21:04 下午 org.apache.tomcat.util.digester.SetPropertiesRule begin
警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property ‘source‘ to ‘org.eclipse.jst.jee.server:MyEL‘ did not find a matching property.
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Server version:        Apache Tomcat/7.0.68
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Server built:          Feb 8 2016 20:25:54 UTC
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Server number:         7.0.68.0
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: OS Name:               Windows 7
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: OS Version:            6.1
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Architecture:          amd64
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Java Home:             D:\Java_Study\Java\jdk1.7.0_79\jre
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: JVM Version:           1.7.0_79-b15
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: JVM Vendor:            Oracle Corporation
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: CATALINA_BASE:         D:\Java_Study\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: CATALINA_HOME:         D:\Java_Study\apache-tomcat-7.0.68
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dcatalina.base=D:\Java_Study\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dcatalina.home=D:\Java_Study\apache-tomcat-7.0.68
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dwtp.deploy=D:\Java_Study\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\webapps
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Djava.endorsed.dirs=D:\Java_Study\apache-tomcat-7.0.68\endorsed
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dfile.encoding=UTF-8
五月 11, 2016 10:21:04 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent
信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: D:\Java_Study\Java\jdk1.7.0_79\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;D:/Java_Study/Java/jdk1.7.0_79/bin/../jre/bin/server;D:/Java_Study/Java/jdk1.7.0_79/bin/../jre/bin;D:/Java_Study/Java/jdk1.7.0_79/bin/../jre/lib/amd64;D:\Java_Study\Java\jdk1.7.0_79\bin;D:\Java_Study\Java\jdk1.7.0_79\jre\bin;D:\Java_Study\mysql-5.7.12-winx64\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\PrivateAssemblies\;C:\Program Files\Microsoft\Web Platform Installer\;C:\Windows\system32\config\systemprofile\.dnx\bin;C:\Program Files\Microsoft DNX\Dnvm\;C:\Program Files\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\;C:\Program Files (x86)\nodejs\;D:\Java_Study\apache-maven-3.3.9\bin;C:\Users\Administrator\AppData\Roaming\npm;D:\Java_Study\eclipse;;.
五月 11, 2016 10:21:04 下午 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["http-bio-8080"]
五月 11, 2016 10:21:04 下午 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["ajp-bio-8009"]
五月 11, 2016 10:21:04 下午 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 363 ms
五月 11, 2016 10:21:04 下午 org.apache.catalina.core.StandardService startInternal
信息: Starting service Catalina
五月 11, 2016 10:21:04 下午 org.apache.catalina.core.StandardEngine startInternal
信息: Starting Servlet Engine: Apache Tomcat/7.0.68
五月 11, 2016 10:21:05 下午 org.apache.catalina.core.ContainerBase startInternal
严重: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/MyEL]]
    at java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.util.concurrent.FutureTask.get(FutureTask.java:188)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1120)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:819)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1572)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1562)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/MyEL]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
    ... 6 more
Caused by: java.lang.IllegalArgumentException: The servlets named [MyELServlet] and [com.dx.app.MyELServlet] are both mapped to the url-pattern [/MyELServlet] which is not permitted
    at org.apache.catalina.deploy.WebXml.addServletMapping(WebXml.java:293)
    at org.apache.catalina.startup.ContextConfig.processAnnotationWebServlet(ContextConfig.java:2462)
    at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2137)
    at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2098)
    at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2090)
    at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2090)
    at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2090)
    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1304)
    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:889)
    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:386)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5472)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
    ... 6 more

五月 11, 2016 10:21:05 下午 org.apache.catalina.core.ContainerBase startInternal
严重: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
    at java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.util.concurrent.FutureTask.get(FutureTask.java:188)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1120)
    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:444)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:738)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:693)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:428)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1572)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1562)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:819)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
    ... 6 more

五月 11, 2016 10:21:05 下午 org.apache.catalina.startup.Catalina start
严重: The required Server component failed to start so Tomcat is unable to start.
org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:693)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:428)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:738)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
    ... 7 more
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:444)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
    ... 9 more
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128)
    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
    ... 11 more

五月 11, 2016 10:21:05 下午 org.apache.coyote.AbstractProtocol pause
信息: Pausing ProtocolHandler ["http-bio-8080"]
五月 11, 2016 10:21:05 下午 org.apache.coyote.AbstractProtocol pause
信息: Pausing ProtocolHandler ["ajp-bio-8009"]
五月 11, 2016 10:21:05 下午 org.apache.catalina.core.StandardService stopInternal
信息: Stopping service Catalina
五月 11, 2016 10:21:05 下午 org.apache.coyote.AbstractProtocol destroy
信息: Destroying ProtocolHandler ["http-bio-8080"]
五月 11, 2016 10:21:05 下午 org.apache.coyote.AbstractProtocol destroy
信息: Destroying ProtocolHandler ["ajp-bio-8009"]

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3     xmlns="http://java.sun.com/xml/ns/javaee"
 4     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
 5     id="WebApp_ID" version="3.0">
 6     <display-name>MyEL</display-name>
 7     <welcome-file-list>
 8         <welcome-file>default.jsp</welcome-file>
 9     </welcome-file-list>
10     <servlet>
11         <servlet-name>MyELServlet</servlet-name>
12         <servlet-class>com.dx.app.MyELServlet</servlet-class>
13     </servlet>
14     <servlet-mapping>
15         <servlet-name>MyELServlet</servlet-name>
16         <url-pattern>/MyELServlet</url-pattern>
17     </servlet-mapping>
18 </web-app>

 1 package com.dx.app;
 2 
 3 import java.io.IOException;
 4 
 5 import javax.servlet.RequestDispatcher;
 6 import javax.servlet.ServletException;
 7 import javax.servlet.annotation.WebServlet;
 8 import javax.servlet.http.HttpServlet;
 9 import javax.servlet.http.HttpServletRequest;
10 import javax.servlet.http.HttpServletResponse;
11 
12 @WebServlet("/MyELServlet")
13 public class MyELServlet extends HttpServlet {
14     private static final long serialVersionUID = 1L;
15         
16     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
17         response.getWriter().append("Served at: ").append(request.getContextPath());
18         request.setAttribute("Hello", "Hello Servlet!");
19         // 请求转发：
20         // 1、调用HttpServletRequest 的getRequestDispatcher()的方法，获取RequestDispatcher对象
21         // 调用getRequestDispatcher()需要传入转发的地址。
22         String servletName="MyDispatcherServlet";
23         RequestDispatcher requestDispatcher=request.getRequestDispatcher("/"+servletName);
24         
25         // 2、调用HttpServletRequest的forward(request,response)方法。
26         requestDispatcher.forward(request, response);        
27     }
28 }