I sometimes get a java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
whenever I access index.jsp. I am running two domains pointing to different
areas with one instance of tomcat, and this following usually (but not always)
triggers it:
1) restart tomcat
2) access domain 2, do some stuff on domain 2
3) access domain 1, at this point I get the above exception.

The exception is only thrown when I access index.jsp, but it works fine if I
specify another page. Full trace below:

StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exception
    java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
    	at java.net.URLClassLoader+1.run(URLClassLoader.java:200)
    	at java.security.AccessController.doPrivileged(Native Method)
    	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    	at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:156)
    	at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:69)
    	at org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:546)
    	at
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:135)
    	at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:283)
    	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
    	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
    	at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
    	at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
    	at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
    	at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
    	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
    	at
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
    	at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
    	at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
    	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
    	at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
    	at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
    	at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
    	at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
    	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
    	at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    	at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
    	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
    	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
    	at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
    	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:793)
    	at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:702)
    	at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:571)
    	at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:644)
    	at java.lang.Thread.run(Thread.java:566)