O eclipse tah acusando um erro no web.xml
web.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app id="WebApp_ID" version="2.4" 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">
<display-name>
jlogin</display-name>
<filter>
<filter-name>filterController</filter-name>
<filter-class>FilterController</filter-class>
</filter>
<filter-mapping>
<filter-name>filterController</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<servlet>
<description>
</description>
<display-name>
validaLoginUsuario</display-name>
<servlet-name>validaLoginUsuario</servlet-name>
<servlet-class>
validaLoginUsuario</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>validaLoginUsuario</servlet-name>
<url-pattern>/validaLoginUsuario</url-pattern>
</servlet-mapping>
<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>
</web-app>
O eclipse fica com 1 “X” vermelho na 1ª linha do web.xml
na guia Problems do eclipse, ele diz:
Referenced file contains errors (http://www.ibm.com/webservices/xsd/j2ee_web_services_client_1_1.xsd). For more information, right click on the message and select "Show Details..."
E esse erro começou a aparecer do nada, eu nem tinha mexido nele…!!
Alguém pode me dar uma luz?

