如果您在 web.xml 和注释中声明了相同的映射，那么在更高版本的 Tomcat 中您将得到这个精确的错误.

I am using Tomcat 7 and Eclipse in JDK 7 to create this simple servlet application. But when I copied the war file into tomcat, I cannot start it and get this error:

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

the web.xml is:

<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>CC</display-name>
  <welcome-file-list>
  <welcome-file>index.html</welcome-file>
  <welcome-file>index.htm</welcome-file>
  <welcome-file>index.jsp</welcome-file>
  <welcome-file>default.html</welcome-file>
  <welcome-file>default.htm</welcome-file>
  <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>

<servlet>
  <servlet-name>create_subscription</servlet-name>
  <servlet-class>servlet.create</servlet-class>
</servlet>

<servlet-mapping>
  <servlet-name>create_subscription</servlet-name>
  <url-pattern>/create</url-pattern>
</servlet-mapping>

</web-app>

If you have the same mapping declared in both web.xml and in an annotation, you will get this precise error with later versions of Tomcat.