HTTP Status 500 description The server encountered an internal error () that prevented it from fulfilling this request.错误解决办法

运行程序出现下面错误：

 HTTP Status 500 -

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type Exception report

message

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

exception

javax.servlet.ServletException: java.lang.VerifyError: (class: org/apache/jasper/compiler/JspUtil, method: <clinit> signature: ()V) Incompatible argument to function
 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:275)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:164)
 org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:141)
 org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:90)
 org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:417)
 com.jking.itf2b.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:76)

------解决方案--------------------------------------------------------

把　/tomcat6/webapps/applicationname/WEB-INF/lib下面RAR和/tomcat6/lib重复的删除．一切ＯＫ