I'm hoping someone else will have time to investigate this in more detail.

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.

thanks
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(RegisterServlet.java:118)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:693)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
       at
org .apache .catalina .core .ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 290)
       at
org .apache .catalina .core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   ..............

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
http://www.nabble.com/file/p22164907/webbJMS.zip webbJMS.zip
In this example: UserServlet and AdminServlet are example application,
RegisterServlet - example application with registering appender and throws
NoClassDefFoundError.
--
View this message in context: 
http://www.nabble.com/Geronimo-sees-jars-in-servlet%2C-but-in-any-object-created-within-this-servlet-throws-NoClassDefFoundError-tp22164907s134p22164907.html
Sent from the Apache Geronimo - Users mailing list archive at Nabble.com.


Reply via email to