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From Kevan Miller <>
Subject context-priority-classloader
Date Tue, 20 Sep 2005 16:27:36 GMT
I just had a look at a problem regarding context-priority-classloader 
reported on the user mailing list (original post is copied below). Hossam is 
attempting to override the SAAJ 1.2 implementation with a SAAJ
1.3implementation (claims that this works under JBoss). Is this
something which
should be supported? Geronimo has explicit checks which will prevent this. 
It's possible that a one line change could fix, but I'm not sure of all of 
the implications.

Both the JettyClassLoader and the TomcatClassLoader prevent javax 
classes/interfaces from being overridden by the context. Should the class 
loaders allow "javax" packages/subpackages to be overridden?

Here's the current list of restrictions for each ClassLoader:

java, javax, org/apache/geronimo, org/apache/jasper, org/apache/tomcat, 
org/apache/naming, org/apache/catalina, org/xml, org/w3c

java, javax, org/apache/geronimo, org/mortbay, org/xml, org/w3c

Are these lists correct? Anything missing? Anything which should be removed?


On 9/19/05, Hossam Karim <> wrote to
> Hello,
> I am using the following configuration:
> geronimo-1.0-M4, Java 1.5.0_04, Windows 2003 Server Enterprise
> My problem:
> I am trying to deploy a WAR with the following deployment plan
> (geronimo-web.xml):
> =======================================
> <?xml version="1.0" encoding="UTF-8"?>
> <web-app xmlns=""
> configId="emee/emee-message">
> <context-root>/emee-message</context-root>
> <context-priority-classloader>true</context-priority-classloader>
> </web-app>
> =======================================
> WEB-INF/lib contains saaj-api.jar and saaj-impl.jar, these are version
> 1.3 NOT 1.2 of SAAJ API,
> and I need to load these implementation not the one that comes with
> Geronimo, beacuse I need to call
> public static javax.xml.soap.MessageFactory
> newInstance(java.lang.String string) method.
> NoSuchMethodException is thrown when it is called, which means Geronimo
> is using SAAJ not the one I
> provided.
> Is there a way I can instruct Geronimo to load the my library? it works
> with JBOSS!!

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