-none- 2007-08-16 - By Matthew Kerle
Back
you're exactly right again. I just checked my project settings, I had to
add catalina.jar to the project libraries to get the class to compile,
but I'd forgotten to prevent it from being deployed, so there was a copy
of catalina.jar in my /WEB-INF/lib, doh!
So I configured it to not be deployed, and deleted the existing jar, so
now I get a new problem, a NoClassDefFoundError on the MemoryUser class,
which is referenced by my code. So now my class doesn't even load!! I
have a feeling someone's gone to a fair bit of trouble to make sure I
can't load this class!
the MemoryUser class is in catalina.jar, which is in the server/lib
folder. would I be right in saying that web application code is barred
from loading any classes from the server/lib directory?
any ideas Peter?
org.codehaus.xfire.XFireRuntimeException: Error invoking
'myapp.service.webservice.ImageService.enumerateLOV(java.lang.String)'.
Nested exception is java.lang.reflect.InvocationTargetException: null
java.lang.reflect.InvocationTargetException
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:597)
at
org.codehaus.xfire.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java
:59)
... elided
at
org.codehaus.xfire.transport.http.XFireServlet.doPost(XFireServlet.java:116)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:269)
... elided
at
org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1286)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NoClassDefFoundError:
org/apache/catalina/users/MemoryUser
at
myapp.service.webservice.ImageServiceImpl.enumerateLOV(ImageServiceImpl.java:67)
... 31 more
Peter Crowther wrote:
> Right. So request.getUserPrincipal() returns a class that's loaded by
> one of Tomcat's classloaders. You need to make sure that when you
> reference MemoryUser, it's loaded by the same classloader.
>
> Thinking aloud here, so apologies to the more experienced folks in the
> community who will have better ideas... Is MemoryUser.class in any of
> the jars in your webapp? I'm not entirely sure why there's a second
> copy of it, loaded by the webapp's classloader, in the system. I'd
> expect the webapp's classloader to be unable to find the class as your
> webapp loads and punt the request for the class up the classloader
> chain, returning the standard classloader's class. But I may be
> misunderstanding Tomcat's classloaders.
>
> - Peter
--
Matthew Kerle
IT Consultant
Canberra, Australia
Mobile: +61404 096 863
Email : mattkerle@(protected)
Web : http://threebrightlights.blogspot.com/
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