I have not worked with JBoss extensively, but trying to add/replace libraries in the app server installation is never a good idea. What you can try is package your application such that the library jar files lie inside the archive. See this link for details on how to do this:

www.onjava.com/pub/a/onjava/2001/06/26/ejb.html

This article provides for a cleaner solution.

Hope this helps.

Best regards

Sanjeev
 

Johan Mörén wrote:

Hi!

Im trying use the Xpath feature of JDOM B9 in a SessionBean running on a JBOSS 3.2.2 server but Jboss is having troubles finding the saxpath library required at runtime.

I have tried with both adding and/or replacing the jdom libraries in ${JBOSS_HOME}/lib and {JBOSS_HOME}/server/default/lib but i always end up with this exception when initilizing the SessionBean:

<trace>

09:47:44,397 ERROR [LogInterceptor] Unexpected Error:
java.lang.NoClassDefFoundError: org/saxpath/SAXPathException
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:140)
        at org.jdom.xpath.XPath.newInstance(XPath.java:133)
        at net.spray.se.pravda2.ejb.NewsItemServiceBean.setSessionContext(Unknown Source)
        at net.spray.se.pravda2.ejb.NewsItemServiceSession.setSessionContext(Unknown Source)
        at org.jboss.ejb.StatelessSessionEnterpriseContext.<init>(StatelessSessionEnterpriseContext.java:47)
        at org.jboss.ejb.plugins.StatelessSessionInstancePool.create(StatelessSessionInstancePool.java:35)
        at org.jboss.ejb.plugins.AbstractInstancePool.get(AbstractInstancePool.java:168)
        at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceIntercepto
r.java:58)
        at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:84)
        at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:267)
        at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:128)
        at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:118)
        at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
        at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122)
        at org.jboss.ejb.StatelessSessionContainer.internalInvoke(StatelessSessionContainer.java:331)
        at org.jboss.ejb.Container.invoke(Container.java:700)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:546)
        at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:367)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
        at sun.rmi.transport.Transport$1.run(Transport.java:148)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
        at java.lang.Thread.run(Thread.java:536)

</trace>

This is the Xpath specific code that runns in the setSessionContext method. However i dont thing the code is the problem since i can get the code to compile and run outside Jboss.

<code>
                try
                {
                        log.debug("Creating XPath instances...");
                        xpStartDate = XPath.newInstance("/sprayNewsItem/header/startDate");
                        xpEndDate = XPath.newInstance("/sprayNewsItem/header/endDate");
                        xpProvider = XPath.newInstance("/sprayNewsItem/header/provider");
                        xpPhase = XPath.newInstance("/sprayNewsItem/header/phase");
                        xpPriority = XPath.newInstance("/sprayNewsItem/header/priority");
                        xpCategory = XPath.newInstance("/sprayNewsItem/header/category");
                        xpSubCategory =
                                XPath.newInstance("/sprayNewsItem/header/subCategory");
                        log.debug("Created XPath instances");
                }
                catch (Exception e)
                {
                        log.error("Failed to create XPath instances" + e);
                        throw new RemoteException("Failed to create XPath instances, " + e);
                }
</code>

Does anyone of you had similar troubles? And perhaps found a soloution and/or an explanation?

Regards,
Johan M�r�n
 
 
 

_____________________________________________________s_p_r_a_y__

Johan M�r�n | Systems developer
Spray Network AB Box 5169 SE-102 44 Stockholm Sweden
johan.moren@staff.spray.se | Phone: +46-(0)8-410 90 000

http://www.spray.se - nu �r det l�ttare att umg�s
 

"It gets harder the more you know. Because the more you know the uglier everything seems" - Frank Zappa
 

_______________________________________________
To control your jdom-interest membership:
http://lists.denveronline.net/mailman/options/jdom-interest/youraddr@yourhost.com

-- 
Best Regards

Sanjeev Verma
Sun ONE App Server Migration Consultant
Web Services, Tools and Migration Tools
Market Development Engineering