java.lang.ClassCastException: java.lang.NoClassDefFoundError

[pir8ped]

Hi,

I have Tomcat 5.5.9, JDK 1.5. I am trying to move a webapp that worked fine with JDK 1.4 (probably an earlier Tomcat too).

I get this when I try to access a page:

java.lang.ClassCastException: java.lang.NoClassDefFoundError at org.apache.jsp.WEB_002dINF.jsp.uncaughtException_jsp._jspService(org.apache.jsp.WEB_002dINF.jsp.uncaughtException_jsp:48) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at....

and see this in the log file:

2005-07-14 10:31:18,781 ERROR [org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/starfriend].[starfriend]] - <Servlet.service() for servlet starfriend threw exception>
java.lang.NoClassDefFoundError: javax/servlet/jsp/tagext/TagLibraryValidator
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(Unknown Source)
	at java.security.SecureClassLoader.defineClass(Unknown Source)
	at java.net.URLClassLoader.defineClass(Unknown Source)
	at java.net.URLClassLoader.access$100(Unknown Source)
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
...

I have tried googling for an answer, and read and re-read docs - any pointers would be very much appreciated.

Thanks,
John Pedersen

 

[pir8ped]

STILL stuck on this one - it has been two days now. Followed ALL (!) the google search results on this one.

Any clues please?

All my JSP's use an include page for the tags which just has these two lines:

<%@ taglib prefix="spring" uri="[URL unfurl="true"]http://www.springframework.org/tags"[/URL] %>
<%@ taglib uri="[URL unfurl="true"]http://java.sun.com/jsp/jstl/core"[/URL] prefix="c" %>

Taking out the second line, the app starts OK, but of course the c: tags are not evaluated. The other tag library works fine.

If I include the second line, then I get the error:

java.lang.NoClassDefFoundError: javax/servlet/jsp/tagext/TagLibraryValidator

and the app won't start.


John