Tomcat6.0+ win7 的奇怪失误

Tomcat6.0+ win7 的奇怪出错
页面经常出现以下错误。查看一个页面的时候必须刷新好几天。。。

最好把tomcat目录的权限设置到最低，错误消失。。

org.apache.jasper.JasperException: org.apache.jasper.JasperException: Unable to compile class for JSP   
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:486)   
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:338)   
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)   
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)   
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)   
    org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1078)   
    org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:295)   
    org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:396)   
    org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:347)   
    org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:232)   
    org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)   
    org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)   
    javax.servlet.http.HttpServlet.service(HttpServlet.java:617)   
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)   
    org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:125)   
root cause   
  
org.apache.jasper.JasperException: Unable to compile class for JSP   
    org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:594)   
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)   
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)   
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)   
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)   
    org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1078)   
    org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:295)   
    org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:396)   
    org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:347)   
    org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:232)   
    org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)   
    org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)   
    javax.servlet.http.HttpServlet.service(HttpServlet.java:617)   
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)   
    org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:125)   
root cause   
  
java.io.IOException: classFile.delete() failed   
    org.apache.jasper.compiler.SmapUtil$SDEInstaller.install(SmapUtil.java:243)   
    org.apache.jasper.compiler.SmapUtil.installSmap(SmapUtil.java:165)   
    org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:454)   
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:334)   
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:312)   
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:299)   
    org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)   
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)   
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)   
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)   
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)   
    org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1078)   
    org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:295)   
    org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:396)   
    org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:347)   
    org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:232)   
    org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)   
    org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)   
    javax.servlet.http.HttpServlet.service(HttpServlet.java:617)   
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)   
    org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:125) 

我的异常网推荐解决方案：org.apache.jasper.JasperException: Unable to compile class,http://www..net/j2ee/2308.html