linux部署tomcat7启动org.apache.jasper.el.ELContextImpl的解决

谁借莪１个温暖的怀抱￠ 2022-06-07 02:15 225阅读 0赞

Tomcat7出现HTTP Status 500 - java.lang.ClassCastException: org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl的解决  
  
今天在Tomcat7上发布了一个war，过一阵子发现localhost:8080都进不去了。在浏览器输入http://localhost:8080出现如下内容：  
  
HTTP Status 500 - java.lang.ClassCastException: org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl  
type Exception report  
  
message java.lang.ClassCastException: org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl  
  
description The server encountered an internal error that prevented it from fulfilling this request.  
  
exception  
  
org.apache.jasper.JasperException: java.lang.ClassCastException: org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl  
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)  
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)  
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)  
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)  
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)  
root cause  
  
java.lang.ClassCastException: org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl  
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:1023)  
org.apache.jsp.index\_jsp.\_jspService(index\_jsp.java:85)  
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)  
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)  
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)  
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)  
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)  
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)  
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.42 logs.  
  
心想真是奇怪了，怎么会有这种问题，于是到网上搜索了以下，看到  
  
http://zhidao.baidu.com/link?url=kF070F2GBut8OmfLq3-LVcCFUM1-qJFcTtz2xIkZ1ekshGRDx64s4hUoiRwyA29TXYwubap9pv4CoF97kP-bpK  
  
里面说是EL表达式的错误，提供了两个解决方案,觉得第二个比较好使，于是修改C:\\Tomcat7\\conf\\context.xml如下：  
  
<?xml version='1.0' encoding='utf-8'?>  
  
<Context>  
     **<Loader delegate="true" />**  
    <WatchedResource>WEB-INF/web.xml</WatchedResource>  
  
</Context>

<End>

加入了上面的粗体红色字后，停止Tomcat7服务，在启动Tomcat7服务，还真好使了。