type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: java.lang.LinkageError: loader constraint violation: loader (instance of org/apache/jasper/servlet/JasperLoader) previously initiated loading for a different type with name "javax/servlet/http/HttpServletRequest"
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:257)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
root cause
java.lang.LinkageError: loader constraint violation: loader (instance of org/apache/jasper/servlet/JasperLoader) previously initiated loading for a different type with name "javax/servlet/http/HttpServletRequest"
java.lang.Class.getDeclaredMethods0(Native Method)
java.lang.Class.privateGetDeclaredMethods(Class.java:2427)
java.lang.Class.getDeclaredMethods(Class.java:1791)
org.jboss.injection.InjectionUtil.collapseXmlMethodInjectors(InjectionUtil.java:74)
org.jboss.web.tomcat.service.injection.TomcatInjectionUtils.processDynamicBeanAnnotations(TomcatInjectionUtils.java:59)
org.jboss.web.tomcat.service.TomcatInjectionContainer.processAnnotations(TomcatInjectionContainer.java:403)
org.jboss.web.tomcat.service.TomcatInjectionContainer.processDynamicBeanAnnotations(TomcatInjectionContainer.java:377)
org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(TomcatInjectionContainer.java:260)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:145)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:322)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
用的是JBOSS5.0 有时出现上边的问题，有时在请求到JSP页面时 出现白版。。点击查看源文件BODY里面什么都没有 显示
------解决方案--------------------------------------------------------
跟我一样的问题。求解。。
------解决方案--------------------------------------------------------
白板可能是因为没有数据
要检查下程序代码
打印下你的sql语句看下