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From David Jencks <>
Subject Re: Geronimo sees jars in servlet, but in any object created within this servlet throws NoClassDefFoundError
Date Mon, 23 Feb 2009 18:04:54 GMT
I'm hoping someone else will have time to investigate this in more  

I suspect you left out the next bit of stack trace which would show a  
log4j class trying to load the Connection class.  This will fail  
because the log4j classes are loaded in a classloader very near or at  
the root of the classloader graph and certainly don't have and javaee  
spec classes such as jms available.

I think people have dealt with this problem before and it would be  
great to have a wiki page on what to do (if we don't already).

One solution is to hide all the log4j classes from your app using the  
hidden-classes plan element and include a copy of  log4j in your app.

It may also be possible to just hide the jms appender classes and  
include those in your app.

hopefully this will point you in a useful direction.

david jencks

On Feb 23, 2009, at 8:31 AM, Rogue angel wrote:

> Hello everyone!
> I`m lost with geronimo 2.1.1! Situation:
> I have a Geronimo 2.1.1 (on 2.1.3 the same problem). I need to  
> register my
> logger in geronimo wich extendeds standart JMSAppender. Within tests
> everything with JMS messaging works just fine. I followed the guide to
> connect JMS applications in Geronimo, described in the wiki. Example
> application works just fine. BUT when i added my logger it breaks.  
> Example
> application throws exception on line with extended appender:
> 17:53:25,031 ERROR [[RegisterServlet]] Servlet.service() for servlet
> RegisterServlet threw exception
> java.lang.NoClassDefFoundError: javax/jms/Connection
>        at webbjms.RegisterServlet.doGet(
>        at javax.servlet.http.HttpServlet.service(
>        at javax.servlet.http.HttpServlet.service(
>        at
> org 
> .apache 
> .catalina 
> .core 
> .ApplicationFilterChain.internalDoFilter( 
> 290)
>        at
> org 
> .apache 
> .catalina 
> .core.ApplicationFilterChain.doFilter(
>    ..............
> So, before line with constructor javax/jms/Connection exists and in  
> this
> line it vanishes. 0_o
> Have you ever seen situation when classes are visible within  
> servlet, but
> not visible in any other classes called in this servlet?
> I tried:
> - add jars into lib folder
> - check jar versions, for both extended appender and example  
> application is
> equal.
> - deployed jars into geronimo repository
> Question: How to make any other class, except called servlet, to see  
> jar
> with Connection class in Geronimo?
> Here is zip with test application and code
> In this example: UserServlet and AdminServlet are example application,
> RegisterServlet - example application with registering appender and  
> throws
> NoClassDefFoundError.
> -- 
> View this message in context:
> Sent from the Apache Geronimo - Users mailing list archive at  

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