xml - Java Web Servlet update -

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I have an application that is using 3.0 servlet and I need to update it, using 3.0 servlet to do. When I match the new service & lt; Web-app & gt; to update the tag, I get the following errors:

org.apache.catalina.LifecycleException: due to starting the failed component [Standards Server [8005]] Reason: Org.apache.catalina.LifecycleException: failed to initialize the component [standard service [Catalina]] by reason: org.apache.catalina.LifecycleException: failed to initialize the component [due to the standard engine [catalina] .standardhost [localhost]]: Org.apache.tomcat.util.bcel.classfile.ClassFormatException: Tap A Java. Class file is not

My web The Xml header looks: 

  & lt ;? XML version = "1.0" encoding = "UTF-8"? & Gt; & Lt; Web-App version = "3.0" xmlns = "http://java.sun.com/xml/ns/javaee" xmlns: xsi = "http://www.w3.org/2001/XMLSchema -instance" Xsi: SchemaLocation = "http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">"

Can anyone tell me what I am missing?


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