RE: Problems running pre-compiled JSP classes when in subdirector
ies 2004-01-07 - By Edson Alves Pereira
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Show us the exception how it appears to you.
> -- ---- --
> De: Jay Glanville[SMTP:jay.glanville@(protected)]
> Responder: Tomcat Users List
> Enviada: quarta-feira, 7 de janeiro de 2004 10:20
> Para: 'Tomcat Users List'
> Assunto: Problems running pre-compiled JSP classes when in
> subdirectories
>
> I originally posted this question back in mid-December, but without any
> responses. In the hopes that someone will have a hit or a solution, I'm
> reposting the question again.
>
>
> I'm having a problem when I try to use my pre-compiled JSP files: I
> receive a NoClassDefFoundError exception. Here's what I'm doing ...
>
> I have pre-compiled my JSP classes using the JspC plugin from ant. My
> files compile without complaint. However, when I try to access the
> files through tomcat, I receive some NoClassDefFoundError exceptions.
> But these exceptions only occur when I'm accessing JSPs in the
> subdirectories off of the web root.
>
> Here's my application's background. I have two files:
> <WEBROOT>/index.jsp
> <WEBROOT>/dir/index.jsp
> The contents of the two files are just simple HTML. I precompiled the
> JSP using the JspC ant target, then compiled using javac. Finally, I
> created a context pointing the work directory to the location of my java
> and class files. When I tried to access the first file
> (http://localhost/context/index.jsp) everything went fine. However,
> when I tried to access the second file
> (http://localhost/context/dir/index.jsp), I received the
> NoClassDefFoundError. The log file looks like this:
>
> 2003-12-15 20:11:25 StandardWrapperValve[jsp]: Servlet.service() for
> servlet jsp threw exception
> javax.servlet.ServletException  : org/apache/jsp/index_jsp (wrong name:
> org/apache/jsp/dir/index_jsp)
> at
> org.apache.jasper.servlet.JspServlet (JspServlet.java:249)
> at javax.servlet.http.HttpServlet (HttpServlet.java:853)
> [deleted ...]
> -- -- Root Cause -- --
> java.lang.NoClassDefFoundError : org/apache/jsp/index_jsp (wrong name:
> org/apache/jsp/dir/index_jsp)
> at java.lang.ClassLoader (Native Method)
> at java.lang.ClassLoader (ClassLoader.java:537)
> at java.lang.ClassLoader (ClassLoader.java:448)
> at
> org.apache.jasper.servlet.JasperLoader (JasperLoader.java:215)
> [deleted]
>
> Now, according to my research on this mailing list, the most frequent
> reason for a NoClassDef error is capitalization. However, this isn't
> the case in my situation as the two package names are completely
> different: org/apache/jsp/index_jsp vs. org/apache/jsp/dir/index_jsp.
>
> I'm using Tomcat 4.1.29.
>
> Any suggestions on how to alleviate this situation would be greatly
> appreciated.
>
> Thanks
>
> JDG
>
> PS: I should also point out that I have tried the recommended way of
> precompiling my JSP by converting to servlets
> (http://jakarta.apache.org/tomcat/tomcat-4 (See http://cat-4.ora-code.com).1-doc/jasper-howto.html#Web%2
> 0Application%20Compilation). However, I have a problem with this
> method: it makes it that much harder to patch my application. With the
> non-servlet approach, I just simply deliver the modified JSP files. With
> the servlet approach, I need to deliver the classes, plus ensure that
> the web.xml is correct (add new entries, remove old ones, modify where
> needed), plus restart the context.
>
>
>
>
> --
> Jay Glanville
>
>
>
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