java.lang.NoClassDefFoundError: org/apache/jsp/Index_jsp

今天在启动Tomcat 后发现出现了这个错误

 严重: Servlet.service() for servlet jsp threw exception  
    java.lang.NoClassDefFoundError: org/apache/jsp/Index_jsp (wrong name: org/apache/jsp/index_jsp)  
        at java.lang.ClassLoader.defineClass1(Native Method)  
        at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)  
        at java.lang.ClassLoader.defineClass(ClassLoader.java:616)  
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)  
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)  
        at java.net.URLClassLoader.access$000(URLClassLoader.java:58)  
        at java.net.URLClassLoader$1.run(URLClassLoader.java:197)  
        at java.security.AccessController.doPrivileged(Native Method)  
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)  
        at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:134)  
        at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:66)  
        at org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:618)  
        at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:144)  
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)  
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)  
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)  
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)  
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)  
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)  
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)  
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)  
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)  
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)  
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)  
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)  
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)  
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)  
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)  
        at java.lang.Thread.run(Thread.java:662)

先说一下背景，因为之前将index.jsp  写成了Index.jsp， 但是我有做了Server 的clean 操作, 似乎没有用处，仍然还是这样子。

然后还有个办法 就是把tomcat/work中对应的文件删除，重新运行启动服务器就OK了。

不过首先要注意一下，Tomcat 的WorkSpace在哪里，。