Deploy war problem

What does the following error error mean? I'm use eclipse and export web project as war file then I deploy to weblogic there is error message that I don't understand.

Message icon - Error Unable to access the selected application.
Message icon - Error Exception in AppMerge flows' progression
Message icon - Error Exception in AppMerge flows' progression
Message icon - Error VALIDATION PROBLEMS WERE FOUND problem: cvc-complex-type.2.4a: Expected elements 'description@http://java.sun.com/xml/ns/javaee display-name@http://java.sun.com/xml/ns/javaee icon@http://java.sun.com/xml/ns/javaee distributable@http://java.sun.com/xml/ns/javaee context-param@http://java.sun.com/xml/ns/javaee filter@http://java.sun.com/xml/ns/javaee filter-mapping@http://java.sun.com/xml/ns/javaee listener@http://java.sun.com/xml/ns/javaee servlet@http://java.sun.com/xml/ns/javaee servlet-mapping@http://java.sun.com/xml/ns/javaee session-config@http://java.sun.com/xml/ns/javaee mime-mapping@http://java.sun.com/xml/ns/javaee welcome-file-list@http://java.sun.com/xml/ns/javaee problem-page@http://java.sun.com/xml/ns/javaee jsp-config@http://java.sun.com/xml/ns/javaee security-constraint@http://java.sun.com/xml/ns/javaee login-config@http://java.sun.com/xml/ns/javaee security-role@http://java.sun.com/xml/ns/javaee env-entry@http://java.sun.com/xml/ns/javaee ejb-ref@http://java.sun.com/xml/ns/javaee ejb-local-ref@http://java.sun.com/xml/ns/javaee service-ref@http://java.sun.com/xml/ns/javaee resource-ref@http://java.sun.com/xml/ns/javaee resource-env-ref@http://java.sun.com/xml/ns/javaee message-destination-ref@http://java.sun.com/xml/ns/javaee persistence-context-ref@http://java.sun.com/xml/ns/javaee persistence-unit-ref@http://java.sun.com/xml/ns/javaee post-construct@http://java.sun.com/xml/ns/javaee pre-destroy@http://java.sun.com/xml/ns/javaee message-destination@http://java.sun.com/xml/ns/javaee locale-encoding-mapping-list@http://java.sun.com/xml/ns/javaee' instead of 'taglib@http://java.sun.com/xml/ns/javaee' here in element web-app@http://java.sun.com/xml/ns/javaee:&lt;null&gt; problem: cvc-complex-type.2.4a: Expected elements 'description@http://java.sun.com/xml/ns/javaee display-name@http://java.sun.com/xml/ns/javaee icon@http://java.sun.com/xml/ns/javaee distributable@http://java.sun.com/xml/ns/javaee context-param@http://java.sun.com/xml/ns/javaee filter@http://java.sun.com/xml/ns/javaee filter-mapping@http://java.sun.com/xml/ns/javaee listener@http://java.sun.com/xml/ns/javaee servlet@http://java.sun.com/xml/ns/javaee servlet-mapping@http://java.sun.com/xml/ns/javaee session-config@http://java.sun.com/xml/ns/javaee mime-mapping@http://java.sun.com/xml/ns/javaee welcome-file-list@http://java.sun.com/xml/ns/javaee problem-page@http://java.sun.com/xml/ns/javaee jsp-config@http://java.sun.com/xml/ns/javaee security-constraint@http://java.sun.com/xml/ns/javaee login-config@http://java.sun.com/xml/ns/javaee security-role@http://java.sun.com/xml/ns/javaee env-entry@http://java.sun.com/xml/ns/javaee ejb-ref@http://java.sun.com/xml/ns/javaee ejb-local-ref@http://java.sun.com/xml/ns/javaee service-ref@http://java.sun.com/xml/ns/javaee resource-ref@http://java.sun.com/xml/ns/javaee resource-env-ref@http://java.sun.com/xml/ns/javaee message-destination-ref@http://java.sun.com/xml/ns/javaee persistence-context-ref@http://java.sun.com/xml/ns/javaee persistence-unit-ref@http://java.sun.com/xml/ns/javaee post-construct@http://java.sun.com/xml/ns/javaee pre-destroy@http://java.sun.com/xml/ns/javaee message-destination@http://java.sun.com/xml/ns/javaee locale-encoding-mapping-list@http://java.sun.com/xml/ns/javaee' instead of 'taglib@http://java.sun.com/xml/ns/javaee' here in element web-app@http://java.sun.com/xml/ns/javaee:&lt;null&gt;
Message icon - Error VALIDATION PROBLEMS WERE FOUND problem: cvc-complex-type.2.4a: Expected elements 'description@http://java.sun.com/xml/ns/javaee display-name@http://java.sun.com/xml/ns/javaee icon@http://java.sun.com/xml/ns/javaee distributable@http://java.sun.com/xml/ns/javaee context-param@http://java.sun.com/xml/ns/javaee filter@http://java.sun.com/xml/ns/javaee filter-mapping@http://java.sun.com/xml/ns/javaee listener@http://java.sun.com/xml/ns/javaee servlet@http://java.sun.com/xml/ns/javaee servlet-mapping@http://java.sun.com/xml/ns/javaee session-config@http://java.sun.com/xml/ns/javaee mime-mapping@http://java.sun.com/xml/ns/javaee welcome-file-list@http://java.sun.com/xml/ns/javaee problem-page@http://java.sun.com/xml/ns/javaee jsp-config@http://java.sun.com/xml/ns/javaee security-constraint@http://java.sun.com/xml/ns/javaee login-config@http://java.sun.com/xml/ns/javaee security-role@http://java.sun.com/xml/ns/javaee env-entry@http://java.sun.com/xml/ns/javaee ejb-ref@http://java.sun.com/xml/ns/javaee ejb-local-ref@http://java.sun.com/xml/ns/javaee service-ref@http://java.sun.com/xml/ns/javaee resource-ref@http://java.sun.com/xml/ns/javaee resource-env-ref@http://java.sun.com/xml/ns/javaee message-destination-ref@http://java.sun.com/xml/ns/javaee persistence-context-ref@http://java.sun.com/xml/ns/javaee persistence-unit-ref@http://java.sun.com/xml/ns/javaee post-construct@http://java.sun.com/xml/ns/javaee pre-destroy@http://java.sun.com/xml/ns/javaee message-destination@http://java.sun.com/xml/ns/javaee locale-encoding-mapping-list@http://java.sun.com/xml/ns/javaee' instead of 'taglib@http://java.sun.com/xml/ns/javaee' here in element web-app@http://java.sun.com/xml/ns/javaee:&lt;null&gt; problem: cvc-complex-type.2.4a: Expected elements 'description@http://java.sun.com/xml/ns/javaee display-name@http://java.sun.com/xml/ns/javaee icon@http://java.sun.com/xml/ns/javaee distributable@http://java.sun.com/xml/ns/javaee context-param@http://java.sun.com/xml/ns/javaee filter@http://java.sun.com/xml/ns/javaee filter-mapping@http://java.sun.com/xml/ns/javaee listener@http://java.sun.com/xml/ns/javaee servlet@http://java.sun.com/xml/ns/javaee servlet-mapping@http://java.sun.com/xml/ns/javaee session-config@http://java.sun.com/xml/ns/javaee mime-mapping@http://java.sun.com/xml/ns/javaee welcome-file-list@http://java.sun.com/xml/ns/javaee problem-page@http://java.sun.com/xml/ns/javaee jsp-config@http://java.sun.com/xml/ns/javaee security-constraint@http://java.sun.com/xml/ns/javaee login-config@http://java.sun.com/xml/ns/javaee security-role@http://java.sun.com/xml/ns/javaee env-entry@http://java.sun.com/xml/ns/javaee ejb-ref@http://java.sun.com/xml/ns/javaee ejb-local-ref@http://java.sun.com/xml/ns/javaee service-ref@http://java.sun.com/xml/ns/javaee resource-ref@http://java.sun.com/xml/ns/javaee resource-env-ref@http://java.sun.com/xml/ns/javaee message-destination-ref@http://java.sun.com/xml/ns/javaee persistence-context-ref@http://java.sun.com/xml/ns/javaee persistence-unit-ref@http://java.sun.com/xml/ns/javaee post-construct@http://java.sun.com/xml/ns/javaee pre-destroy@http://java.sun.com/xml/ns/javaee message-destination@http://java.sun.com/xml/ns/javaee locale-encoding-mapping-list@http://java.sun.com/xml/ns/javaee' instead of 'taglib@http://java.sun.com/xml/ns/javaee' here in element web-app@http://java.sun.com/xml/ns/javaee:&lt;null&gt;

This is my web.xml file

<?xml version="1.0" encoding="ISO-8859-1"?>


<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
 version="2.4">

  <display-name>Welcome to Tomcat</display-name>
   <description>
     Welcome to Tomcat
  </description>

    <servlet>
        <servlet-name>ServletLogin</servlet-name> 
        <servlet-class>com.ko.servlet.action.ServletLogin</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>ServletLogin</servlet-name>
        <url-pattern>/ServletLogin</url-pattern>  
    </servlet-mapping>

    <servlet>
        <servlet-name>TombolInfoGenerator</servlet-name> 
        <servlet-class>com.ko.servlet.action.TambolInfoGenerator</servlet-class> 
    </servlet>
    <servlet>
     <description>
     </description>
     <display-name>ArrestAction</display-name>
     <servlet-name>ArrestAction</servlet-name>
     <servlet-class>
     com.ko.servlet.ArrestAction</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>TombolInfoGenerator</servlet-name>
        <url-pattern>/TombolInfoGenerator</url-pattern>  
    </servlet-mapping>
    <servlet-mapping>
     <servlet-name>ArrestAction</servlet-name>
     <url-pattern>/ArrestAction</url-pattern>
    </servlet-mapping>


 <taglib>
  <taglib-uri>
   http://jsptags.com/tags/navigation/pager
    </taglib-uri>
    <taglib-location>
     /WEB-INF/jsp/pager-taglib.tld
    </taglib-location>
 </taglib>

 <taglib>
  <taglib-uri>
   http://java.sun.com/jstl/core
  </taglib-uri>
  <taglib-location>
   /WEB-INF/jstl/c.tld
  </taglib-location>

 </taglib>

 <welcome-file-list>
  <welcome-file>main.jsp</welcome-file>
 </welcome-file-list>

</web-app>

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Deploy war problem

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