loader constraints violated when loading mapping file

[Jon Brisbin <br...@ipa.net>]

when i go to load my own struts app in tomcat 4, i get the following error
when ANY servlet in that webapp tries to start...it has to do with the whole
xerces/struts/tomcat4 issue, but i'm not sure why the servlet won't load for
this app, but it will for the struts example app...same message when loading
servlet "jsp" too...
java.lang.LinkageError: loader constraints violated when linking
org/xml/sax/HandlerBase class
	at org.apache.struts.digester.Digester.parse(Digester.java:755)
	at
org.apache.struts.action.ActionServlet.initMapping(ActionServlet.java:1331)
	at org.apache.struts.action.ActionServlet.init(ActionServlet.java:465)
	at javax.servlet.GenericServlet.init(GenericServlet.java:258)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:857)
	at
org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:602)
	at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:214)
	at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
	at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
	at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:219)
	at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
	at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
	at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2251)
	at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164
)
	at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
	at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:446)
	at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
	at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
	at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:163)
	at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
	at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
	at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:
984)
	at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1074
)
	at java.lang.Thread.run(Thread.java:484)