java.lang.IllegalStateException
type Exception report

message 

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

exception 

java.lang.IllegalStateException
org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:433)
com.fuyou.servlet.loginservlet.doPost(loginservlet.java:93)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.25 logs.


--------------------------------------------
当username="guest"，会有上面的异常，但username="admin"时，可以正常运行

------解决方案--------------------
或许是你的 guest.jsp里面有语法错误
------解决方案--------------------
把guest.jsp贴出来看看
我的异常网推荐解决方案：The server encountered an internal error () that prevented it from fulfilling this request.,http://www.aiyiweb.com/java-web/317.html