Server Tomcat v7.0 Server at localhost failed to start.错误可能原因之一

女爷i 2024-02-18 14:18 24阅读 0赞

####     ####

#### 故事由来： ####

学Servlet中，突然发现启动Tomcat时出现这个问题

![798772-20160918205425094-1142861503.png][]

#### 故事梗概： ####

学习servlet尽然能碰到服务器起不来的，百思不得其解，然后我百度，我FQgoogle，找stackoverflow。找到了不少答案，比如stackoverflow给出说是在

<table style="border-collapse: collapse; border-spacing: 0px; border: 1px solid silver; width: 1473px; word-break: break-word; margin: 0px !important; padding: 0px !important; border-radius: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.1em !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; box-sizing: content-box !important; font-family: Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important; font-size: 12px !important; min-height: auto !important; background: none !important;"> 
 <tbody style="margin: 0px !important; padding: 0px !important; border-radius: 0px !important; border: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.1em !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; min-height: auto !important; background: none !important;"> 
  <tr style="margin: 0px !important; padding: 0px !important; border-radius: 0px !important; border: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.1em !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; min-height: auto !important; background: none !important;"> 
   <td style="padding: 3px; border: 1px solid silver; border-collapse: collapse; margin: 0px !important; border-radius: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.1em !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: 35px !important; box-sizing: content-box !important; font-family: Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important; min-height: auto !important; color: rgb(175, 175, 175) !important; background: none !important;"> 
    <div style="margin: 0px !important; padding: 0px 0.5em !important; border-radius: 0px !important; border-width: 0px 2px 0px 0px !important; border-right-style: solid !important; border-right-color: rgb(108, 226, 108) !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.8em !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; text-align: right !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; min-height: auto !important; white-space: nowrap !important; background: none rgb(244, 244, 244) !important;">
      1 
    </div></td> 
   <td style="padding: 3px; border: 1px solid silver; border-collapse: collapse; margin: 0px !important; border-radius: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.1em !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; font-family: Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important; min-height: auto !important; background: none !important;"> 
    <div style="margin: 0px !important; padding: 0px !important; border-radius: 0px !important; border: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.1em !important; outline: 0px !important; overflow: visible !important; position: relative !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; min-height: auto !important; background: none !important;"> 
     <div style="margin: 0px !important; padding: 0px 1em !important; border-radius: 0px !important; border: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.8em !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; min-height: auto !important; white-space: nowrap !important; background: none rgb(244, 244, 244) !important;"> 
      <code style="margin: 0px !important; padding: 0px !important; border-radius: 0px !important; border: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.8em !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; font-family: Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important; min-height: auto !important; background: none !important;">&lt;workspace-directory&gt;\.metadata\.plugins\org.eclipse.core.resources</code> 
     </div> 
    </div></td> 
  </tr> 
 </tbody> 
</table>

中有个.snap文件删掉，就可解决这个问题，我试了不行。stackoverflow的链接如下：[http://stackoverflow.com/questions/13244233/server-tomcat-v7-0-server-at-localhost-failed-to-start-without-stack-trace-whi][http_stackoverflow.com_questions_13244233_server-tomcat-v7-0-server-at-localhost-failed-to-start-without-stack-trace-whi]。

百度下，Myexception网给出答案是1、端口被占用，2、启动时间不够，3、eclipse引发的问题，4、重新启动电脑（最笨的办法，如果不停的出现，不停的重起会烦死的。）。[下面是原文链接][Link 1]。这答案给的没有一个是我要的，所以，以后还是尽量谷歌，百度感觉真心不靠谱。

#### 故事真相： ####

在eclipse这个强大的软件中，我们省略很多手动写代码的时间，过程如下：

![798772-20160918212806690-1233826313.png][]

![798772-20160918212820191-1647720984.png][]

在上图中点击finish后就生成下面的代码。

比如在eclipse中，我们建一个新的 servlet文件后，代码中会生成如下一大块代码。

![复制代码][copycode.gif]

1 import java.io.IOException;
     2 import javax.servlet.ServletException;
     3 import javax.servlet.annotation.WebServlet;
     4 import javax.servlet.http.HttpServlet;
     5 import javax.servlet.http.HttpServletRequest;
     6 import javax.servlet.http.HttpServletResponse;
     7 
     8 /**
     9  * Servlet implementation class ServletDemo
    10  */
    11 @WebServlet("/ServletDemo")
    12 public class ServletDemo extends HttpServlet {
    13     private static final long serialVersionUID = 1L;
    14        
    15     /**
    16      * @see HttpServlet#HttpServlet()
    17      */
    18     public ServletDemo() {
    19         super();
    20         // TODO Auto-generated constructor stub
    21     }
    22 
    23     /**
    24      * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
    25      */
    26     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    27         // TODO Auto-generated method stub
    28         response.getWriter().append("Served at: ").append(request.getContextPath());
    29     }
    30 
    31     /**
    32      * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
    33      */
    34     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    35         // TODO Auto-generated method stub
    36         doGet(request, response);
    37     }
    38 
    39 }

![复制代码][copycode.gif]

而这里面，留意下有个注解

@WebServlet("/ServletDemo")

这个注解是eclipse帮我们生成好的，而问题恰恰就出在这。我们知道，每次我们新建一个servlet后会在web.xml文件中配置映射关系，这样才能在浏览器敲入一个地址后，地址发来的请求能让服务器接收到请求并将该请求交给指定的Servlet去处理。web.xml的作用就在此，它的代码如下：

![复制代码][copycode.gif]

<?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" version="3.0">
      <servlet>
        <servlet-name>ServletDemo</servlet-name>
        <servlet-class>com.vivizhang.servlet.HelloWorldServlet</servlet-class>
      </servlet>
      <servlet-mapping>
        <servlet-name>ServletDemo</servlet-name>
        <url-pattern>/HelloServlet</url-pattern>
      </servlet-mapping>
    </web-app>

![复制代码][copycode.gif]

所以问题的真相就是配置和自动生成的注解冲突了，导致如下的错误（截取）：

![复制代码][copycode.gif]

A child container failed during start
    java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/ServletDemo]]
        at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
        at java.util.concurrent.FutureTask.get(FutureTask.java:111)
        at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1120)
        at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:819)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1572)
        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1562)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        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:722)
    Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/HelloServlet]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
        ... 7 more
    Caused by: java.lang.IllegalArgumentException: The servlets named [ServletDemo] and [com.vivizhang.servlet.ServletDemo] are both mapped to the url-pattern [/ServletDemo] 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.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)
        ... 7 more
    
    九月 18, 2016 4:40:37 下午 org.apache.catalina.core.ContainerBase startInternal
    SEVERE: 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$Sync.innerGet(FutureTask.java:252)
        at java.util.concurrent.FutureTask.get(FutureTask.java:111)
        at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1120)
        at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
        at org.apache.catalina.core.StandardService.startInternal(StandardService.java:444)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
        at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:738)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:693)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:428)
    Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1572)
        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1562)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        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:722)
    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)
        ... 7 more
    
    九月 18, 2016 4:40:37 下午 org.apache.catalina.startup.Catalina start
    SEVERE: The required Server component failed to start so Tomcat is unable to start.
    org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8006]]
        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:601)
        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

![复制代码][copycode.gif]

这里的问题出在：

The servlets named [ServletDemo] and [com.vivizhang.servlet.ServletDemo] are both mapped to the url-pattern [/ServletDemo] which is not permitted

#### 故事解决办法： ####

可以选择删除web.xml中的映射，也可以选择将自动生成的注解注释掉，这样就不会有冲突了，二者选其一留下即可。

#### 故事后续： ####

如果在其他问题都没出错的情况下，可能就是xml文件和注解出现了冲突，当然，出现这个问题的原因不止这一个，会有其他很多原因，去google吧，希望我的文章能帮助你解决实际的问题。

#### 转载：http://www.cnblogs.com/vivizhang/p/vivizhang.html ####

[798772-20160918205425094-1142861503.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/16afa5f36cda4936a9b8814e9a3002cb.png
[http_stackoverflow.com_questions_13244233_server-tomcat-v7-0-server-at-localhost-failed-to-start-without-stack-trace-whi]: http://stackoverflow.com/questions/13244233/server-tomcat-v7-0-server-at-localhost-failed-to-start-without-stack-trace-whi
[Link 1]: http://www.myexception.cn/h/1409244.html
[798772-20160918212806690-1233826313.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/4a51651abb974fb28641480c7a1885e0.png
[798772-20160918212820191-1647720984.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/a3d86d705c6f4ea084c143b704d2363d.png
[copycode.gif]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/5b78149b631547d7abe405f8b82042f8.png