谁遇到过这种异常？我已经弄一天了，也没弄明白是怎么回事。

[aaassd]

HTTP Status 500 - Error retrieving attribute debug

--------------------------------------------------------------------------------

type Status report

message Error retrieving attribute debug

description The server encountered an internal error (Error retrieving attribute debug) that prevented it from fulfilling this request.

---------------
---------------
启动tomcat后，访问webmodule的时候出现的异常。

[scud]

server.xml 或者web.xml有错. 包含不支持的属性

[aaassd]

我也想是web.xml的问题，因为我是加了CheckLoginFilter以后才出错的。
于是我又重新做了一个工程，web.xml用到的几个类都做进去，可以正常，反而我原来的还是不正常，郁闷。


<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>istart</display-name>
<filter>
<filter-name>SetCharacterEncoding</filter-name>
<filter-class>fgproj.filter.SetCharacterEncodingFilter</filter-class>
<!--需要转换为什么类型的编码，以后修改可以在这里修改-->
<init-param>
<param-name>encoding</param-name>
<param-value>GB2312</param-value>
</init-param>
</filter>

<filter>
<filter-name>CheckLoginFilter</filter-name>
<filter-class>fgproj.filter.CheckLoginFilter</filter-class>
<init-param>
<param-name>redirectURL</param-name>
<param-value>aa</param-value>
</init-param>

<init-param>
<param-name>notCheckURLList</param-name>
<param-value>x.jsp;y.jsp</param-value>
</init-param>
</filter>

<filter-mapping>
<filter-name>SetCharacterEncoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>CheckLoginFilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>

<servlet>
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>2</param-value>
</init-param>
<!--init-param>
<param-name>application</param-name>
<param-value>ApplicationResources</param-value>
</init-param-->
<load-on-startup>1</load-on-startup>
</servlet>

<servlet>
<servlet-name>log4jinit</servlet-name>
<servlet-class>fgproj.filter.Log4jInitServlet</servlet-class>
<init-param>
<param-name>log4j</param-name>
<param-value>WEB-INF/classes/log4j.properties</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<taglib>
<taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-html.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-template.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-template.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-tiles.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-tiles.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-nested.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-nested.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.com/jstl/core</taglib-uri>
<taglib-location>/WEB-INF/c.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.com/jstl/core_rt</taglib-uri>
<taglib-location>/WEB-INF/c-rt.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.com/jstl/xml</taglib-uri>
<taglib-location>/WEB-INF/x.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.com/jstl/xml_rt</taglib-uri>
<taglib-location>/WEB-INF/x-rt.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.com/jstl/fmt</taglib-uri>
<taglib-location>/WEB-INF/fmt.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.com/jstl/fmt_rt</taglib-uri>
<taglib-location>/WEB-INF/fmt-rt.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.com/jstl/sql</taglib-uri>
<taglib-location>/WEB-INF/sql.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.com/jstl/sql_rt</taglib-uri>
<taglib-location>/WEB-INF/sql-rt.tld</taglib-location>
</taglib>
</web-app>

[aaassd]

<filter>
<filter-name>CheckLoginFilter</filter-name>
<filter-class>fgproj.filter.CheckLoginFilter</filter-class>
<init-param>
<param-name>redirectURL</param-name>
<param-value>aa</param-value>
</init-param>

<init-param>
<param-name>notCheckURLList</param-name>
<param-value>x.jsp;y.jsp</param-value>
</init-param>
</filter>
为什么上面的第二个参数就不行呢？
我把这个注释掉就可以，我换了别的名字也不行。

[aaassd]

谁能说说用struts处理异常通常都怎么定义，和捕获各个层次之间的异常的。