are both mapped to the url-pattern 错误解决方法

今天运行tomcat的时候出现报了一大波错误，下面我截取了部分错误信息：

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[/ErrorCleaner]]
    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:915)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:871)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1407)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1397)
    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[/ErrorCleaner]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
    ... 6 moreCaused by: java.lang.IllegalArgumentException: The servlets named [cn.zr.servlet.ErrorQueueServlet] and [cn.zr.servlet.ModificationAuditServlet] are both mapped to the url-pattern [/ErrorQueueServlet] which is not permitted    at org.apache.tomcat.util.descriptor.web.WebXml.addServletMapping(WebXml.java:308)    at org.apache.catalina.startup.ContextConfig.processAnnotationWebServlet(ContextConfig.java:2373)    at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2055)    at org.apache.catalina.startup.ContextConfig.processAnnotationsWebResource(ContextConfig.java:1940)    at org.apache.catalina.startup.ContextConfig.processAnnotationsWebResource(ContextConfig.java:1934)    at org.apache.catalina.startup.ContextConfig.processAnnotationsWebResource(ContextConfig.java:1934)    at org.apache.catalina.startup.ContextConfig.processAnnotationsWebResource(ContextConfig.java:1934)    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1147)    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:779)    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:306)    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:95)    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5202)    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)    ... 6 more

　　上面这么多错误，还好有一句能看懂的：are both mapped to the url-pattern。意思是有两个url-parttern映射名称是相同的

　　下面贴出解决办法：

　　1、web.xml里不同的servlet中<url-pattern/>有相似的。

　　2、web.xml中的第一行声明有问题。

　　3、（终极）Servlet类注释错误，看下面的注释@WebServlet()括号里的内容就是url-pattern，改一下呗，这个是在stackoverflow里找到的解释

@WebServlet("/EditServlet")
public class ProcessServlet extends HttpServlet {

}