Zack, 

I don't think it's the include directive alone causing a memory error. I'm 
guessing that there might be a lot of processes in his application running on 
Tomcat, eventually causing an out of memory error or may be the system does not 
have minimum required memory to run Tomcat. 

With Tomcat 5.5, and about 2GB RAM I'm not getting an OutOfMemory error while 
running 3 applications simultaneously on Tomcat, when I tried his example of 
include directives, I got the error on the screen and it was logged in Tomcat's 
logs as well.

I ran my test as follows: http://practice:8080/p/test2/test2.jsp?f=page.html , 
and test2.jsp had <%@ include file="request.getParameter("f")" %> (which I 
believe won't work)

Here's parts of the error, if it helps him:

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: Unable to load class for JSP
 org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:598)
 
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:137)
 org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:305)
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
java.lang.ClassNotFoundException: org.apache.jsp.p.test2.test2_jsp
 java.net.URLClassLoader$1.run(URLClassLoader.java:200)
 java.security.AccessController.doPrivileged(Native Method)
 java.net.URLClassLoader.findClass(URLClassLoader.java:188)
 org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:133)
 org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:65)
 org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:596)
 
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:137)
 org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:305)
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


Also, if he sets up JSTL1.1 correctly, the following will also work:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"; %>
<c:import url="${param.f}"/>

Where param.f , is the equivalent of request.getParameter("f")

-Rashmi

  
Rashmi,

I'm curious as to why his second approach causes the memory error that 
he gets, would you have any insight as to why it's happening?  I've 
checked out the docs and they don't indicate anything about the way the 
include directive uses memory.  I'm thinking we might actually have a 
bug to report.

Zack


 
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