tomcat作虚拟主机出现的问题

yesright

我的环境：
tomcat5.27作jsp 虚拟主机
在server.xml中，在<Host>;</Host>;中，只有如下配置才有效
      <Host name="localhost" debug="0" appBase="/tomcat5/webapps"
如果把localhost改成别的在互联网上可用的域名，都无法解析servlet类。
但可以解析.jsp文件。请问是什么问题。

如果不用localhost出现的问题如下：
HTTP Status 500 -

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

type Exception report

message

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

exception

org.apache.jasper.JasperException
        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1074)
        org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:420)
        org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:269)
        org.apache.struts.action.ActionServlet.process(ActionServlet.java:1176)
        org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:454)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root cause

java.lang.NullPointerException
        org.apache.jsp.enterprise.ent_jsp._jspService(ent_jsp.java:211)
        org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1074)
        org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:420)
        org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:269)
        org.apache.struts.action.ActionServlet.process(ActionServlet.java:1176)
        org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:454)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


note The full stack trace of the root cause is available in the Apache Tomcat/5.0.27 logs.


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

Apache Tomcat/5.0.27

yesright

up

wuxin5522

遇到同样的问题。
.jsp显示正常。
可是一需要servlet处理的页面就找不到～～