【发布时间】：2014-05-02 16:55:27
【问题描述】：
在 web.xml 中更改我的 servlet URL 后：
<servlet>
<servlet-name>test</servlet-name>
<servlet-class>pack.HelloWorld</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>test</servlet-name>
<url-pattern>/another/path</url-pattern>
</servlet-mapping>
并更改 servlet 本身的注释。
@WebServlet("/another/path")
public class HelloWorld extends HttpServlet {
private static final long serialVersionUID = 1L;
我无法再从 Eclipse 启动 servlet：
java.lang.IllegalArgumentException：名为 [test] 和 [pack.HelloWorld] 的 servlet 都映射到不允许的 url-pattern [/another/path]
它背后的原因是什么？如何在不从 servlet 中删除注释的情况下解决它？
堆栈跟踪：
SEVERE: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/HelloWorld2]]
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
at java.util.concurrent.FutureTask.get(FutureTask.java:111)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:801)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:701)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/HelloWorld2]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
... 7 more
Caused by: java.lang.IllegalArgumentException: The servlets named [test] and [pack.HelloWorld] are both mapped to the url-pattern [/another/path] which is not permitted
at org.apache.catalina.deploy.WebXml.addServletMapping(WebXml.java:292)
at org.apache.catalina.startup.ContextConfig.processAnnotationWebServlet(ContextConfig.java:2485)
at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2161)
at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2122)
at org.apache.catalina.startup.ContextConfig.processAnnotationsFile(ContextConfig.java:2115)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1295)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:880)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:378)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5343)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 7 more
May 2, 2014 7:16:26 PM org.apache.catalina.core.ContainerBase startInternal
SEVERE: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
at java.util.concurrent.FutureTask.get(FutureTask.java:111)
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:690)
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:622)
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$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:701)
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:801)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 7 more
【问题讨论】：
-
是否有任何堆栈跟踪导致此错误消息？尽可能启用调试日志记录以获取尽可能多的信息。
标签： eclipse tomcat servlets mapping