Question

我做了一个有错误的特定项目：

出现问题：localhost上的服务器Tomcat v7.0服务器无法启动。

当我尝试启动tomcat来运行它时。这是我的代码。这是从核心servlet书中获取的。

package com.sample;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
@WebServlet("/HelloServlet")
public class HelloServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public HelloServlet() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html"); 
PrintWriter out = response.getWriter(); 
String docType = 
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " + 
"Transitional//EN\">\n"; 
out.println(docType + 
"<HTML>\n" + 
"<HEAD><TITLE>Hello</TITLE></HEAD>\n" + 
"<BODY BGCOLOR=\"#FDF5E6\">\n" + 
"<H1>Hello</H1>\n" + 
"</BODY></HTML>");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
}

这是堆栈跟踪：

Jan 12, 2014 1:36:39 PM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Java\jdk1.7.0_45\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Java/jdk1.7.0_45/bin/../jre/bin/client;C:/Java/jdk1.7.0_45/bin/../jre/bin;C:/Java/jdk1.7.0_45/bin/../jre/lib/i386;;.;C:\Java\jdk1.7.0_45\bin;C:\Windows\system32;C:\Windows;C:\Windows\system32\wbem;C:\Windows\system32\windowspowershell\v1.0\;c:\program files\broadcom\broadcom 802.11 network adapter\driver;c:\program files\microsoft sql server\100\tools\binn\;c:\program files\microsoft sql server\100\dts\binn\;c:\program files\microsoft sql server\100\tools\binn\vsshell\common7\ide\;c:\program files\microsoft visual studio 9.0\common7\ide\privateassemblies\;c:\program files\ibm\gsk8\lib;C:\PROGRA~1\IBM\SQLLIB\BIN;C:\PROGRA~1\IBM\SQLLIB\FUNCTION;C:\PROGRA~1\IBM\SQLLIB\SAMPLES\REPL;C:\MinGW\bin;;C:\jee_web_development\eclipse-jee-kepler-SR1-win32\eclipse;;.
Jan 12, 2014 1:36:39 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:test-app' did not find a matching property.
Jan 12, 2014 1:36:39 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:HelloServlet' did not find a matching property.
Jan 12, 2014 1:36:39 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Jan 12, 2014 1:36:39 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
Jan 12, 2014 1:36:39 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 465 ms
Jan 12, 2014 1:36:39 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Jan 12, 2014 1:36:39 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.47
Jan 12, 2014 1:36:40 PM 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].StandardContext[/HelloServlet]]
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:1123)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
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:744)
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:154)
... 6 more
Caused by: java.lang.IllegalArgumentException: The servlets named [/HelloServlet] and [com.sample.HelloServlet] are both mapped to the url-pattern [/HelloServlet] which is not permitted
at org.apache.catalina.deploy.WebXml.addServletMapping(WebXml.java:335)
at org.apache.catalina.startup.ContextConfig.processAnnotationWebServlet(ContextConfig.java:2466)
at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2148)
at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2109)
at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2102)
at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2102)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1293)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:376)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5322)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 6 more

Jan 12, 2014 1:36:40 PM 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.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:188)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.startup.Catalina.start(Catalina.java:691)
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:322)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:456)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
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:744)
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 6 more

Jan 12, 2014 1:36:40 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: Failed to start component [StandardServer[8005]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.startup.Catalina.start(Catalina.java:691)
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:322)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:456)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 7 more
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 9 more
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 11 more

Jan 12, 2014 1:36:40 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-bio-8080"]
Jan 12, 2014 1:36:40 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["ajp-bio-8009"]
Jan 12, 2014 1:36:40 PM org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Catalina
Jan 12, 2014 1:36:40 PM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["http-bio-8080"]
Jan 12, 2014 1:36:40 PM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["ajp-bio-8009"]

我是sevlets的新手，不知道大多数错误是什么意思。我究竟做错了什么？我在SO上搜索了这样的其他问题，但我找到的答案没有用。

这是我的web.xml文件：

<servlet>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>com.sample.HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>/HelloServlet</servlet-name>
<url-pattern>/HelloServlet</url-pattern>
</servlet-mapping>

我实际上不知道这是什么以及这是为了什么。但我导入的大多数项目都有这个，所以我只做一个。不确定这是否正确。

Answer 1

可能是因为您将web.xml servlet配置与基于注释的配置混合在一起，因此请检查您是否在web.xml中声明了相同的servlet。

基于您的xml，您有两个选项，因为您正在使用注释配置您的servlet，您可以从web.xml中删除de标签。或者，如果要修复web.xml，则需要删除start / from servlet-name标记，它需要与之前的servlet名称匹配，以便：

<servlet-mapping> 
   <servlet-name>HelloServlet</servlet-name> 
   <url-pattern>/HelloServlet</url-pattern> 
</servlet-mapping>

Answer 2

你必须导入“javax.servlet.annotation.WebServlet”才能使用@WebServlet（“/ HelloServlet”），你可以使用可移植的tomcat并检查server.xml文件中tomcat的端口号，这样tomcat端口就不会冲突你现有的港口。

Answer 3

错误：Tomcat服务器无法启动

分辨率：

清理工作区（它可以多次使用
Tomcat whle直接运行指向web.xml文件.. 需要检查什么是inweb.xml文件....†他的结果也是服务器问题
有时它是由于与jar文件的不正确绑定而发生的。首先将手动jar文件添加到WEB-INF，lib文件夹中，然后再添加右键单击项目和Properties，然后将jar添加到构建路径选项。

正确清理，构建工作区，然后再次尝试启动服务器。它会起作用:)）

Answer 4

localhost上的服务器Tomcat v7.0服务器无法启动。

在我的日食（朱诺）中，我修正了以下方法。

1.清洁项目＆amp;服务器

2.从以下目录中删除 .snap 文件

{工作空间目录} \。元数据位于\ .plugins \ org.eclipse.core.resources

OR

3.从以下目录

中删除 temp 文件

{工作空间目录} \。元数据位于\ .plugins \ org.eclipse.wst.server.core

Answer 5

我试了两天然后我终于解决了它

1）单击“服务器”选项卡 2）双击Tomcat版本 3）单击打开启动配置 4）单击“类路径” 5）将Common-logging jar文件添加到用户条目

名为[/ HelloServlet]和[com.sample.HelloServlet]的servlet都映射到url-pattern [/ HelloServlet]，这是不允许的

5 个答案: