Most of the time java.lang.NoClassDefFoundError is not the actual problem.
There should be another exception before that.
You should be looking for an exception which happens during the static
initialization of the class in the message. Any access to this class will
trigger NoClassDefFound but it means only that the class is not loaded. It does
not tell you why.
Here is an example where the real problem is a NullPointerException but it will
crash with NoClassDefFound:
public class Main {
public static void main(String[] args) {
try {
System.out.println(C.s);
} catch (Throwable e) {
// System.err.println(e.getClass().getName()
// + " - caused by: "
// + e.getCause().getClass().getName());
System.out.println(C.s);
}
}
}
class C {
final static String s = null;
static {
s.hashCode();
}
}
--- On Fri, 4/30/10, Mike Schrag <[email protected]> wrote:
From: Mike Schrag <[email protected]>
Subject: Re: Getting Started with ERRest / Could not initialize class
er.rest.format.ERXRestFormat error
To: "WO Dev Group" <[email protected]>
Date: Friday, April 30, 2010, 4:40 AM
looks like a wacky setup, but i don't know what ... i don't know how you could
have ERXRouteController exist, but ERXRestFormat NOT exist. NoClassDefFound is
almost always a funky classpath problem. Does ERXRestFormat exist in your
workspace? Is your ERRest framework a complete build?
ms
On Apr 29, 2010, at 9:52 PM, Johnny Miller wrote:
Hi,
I'm trying to get my head around ERRest and I'm using the ERRestRouteExample as
my guide.
So far I just added ERRest to a new project and added one entity from a
framework model to my ERXRouteRequestHandler using the addDefaultRoutes method.
I can start the application but when I try to see a basic show route
i.e. http://10.0.42.4:53339/cgi-bin/WebObjects/ExampleRestServer.woa/ra/(EntityName).xml
I get the following error:
NoClassDefFoundError: Could not initialize class er.rest.format.ERXRestFormat
at er.rest.routes.ERXRouteController.format(ERXRouteController.java:366) at
er.rest.routes.ERXRouteController.errorResponse(ERXRouteController.java:978)
at
er.rest.routes.ERXRouteController.performActionNamed(ERXRouteController.java:1265)
at
er.rest.routes.ERXRouteController.performActionNamed(ERXRouteController.java:1129)
... skipped 8 stack elements
Could this be an error in my setup? ERRest is added to the path so I'm a
little confused on the error.
Thanks in advance,
Johnny
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