Thanks Andreas, I will read the article and hope it sheds some light on
this issue. Classpath issues are the one of the biggest pains of Java.
Regards,
Gordon Dickens
Andreas Schaefer wrote:
NoClassDefFoundError means that there is a linkage problem meaning a
class is loaded by a parent class loader which does not have access to
the children class loaders' classes. You must make sure that the class
referencing to the MessageException is loaded by the same class loader
as the MessageException.
Unfortunately there is not much you can do to figure out what is wrong
except these two:
- Use "-vebose:class" flag when you start Smx which will could
indicate what class is trying to load MessageException
- Instrument URL Class Loader. For that have a look at my articles at
OnJava.com: http://www.onjava.com/pub/a/onjava/2004/06/30/classloader2.html
Hope this helps and let me know if that worked or not
Andreas Schaefer
CEO of Madplanet.com Inc.
[EMAIL PROTECTED]
On Jan 22, 2008, at 9:02 AM, Gordon Dickens wrote:
I did try defining with the explicit classpath (as below). I also
tried setting the "self-first" and "parent-first" settings within
separate tests and still the same result.
I want the classes to be loaded from jars within the SU, but it
seems as though they are only loading when they are in the
ServiceMix/lib/optional directory.
Any other suggestions?
Thanks,
Gordon Dickens
Guillaume Nodet wrote:
Have you tried without defining the <classpath/> element
explicitely ?
The component will create the correct classloader by defaut.
Anyway, if this does not work, the problem may be completely
different.
It depends on where the classes are loaded from: are they loaded
from the
SU or from the component or even container for some reason ?
On Jan 18, 2008 9:58 PM, Gordon Dickens <[EMAIL PROTECTED]>
wrote:
Hello,
In an effort to minimize the clutter of our ServiceMix (v3.2.1)
lib/optional directory I would like to bundle dependent jars within
their corresponding service units.
The problem I am running into is with a service unit that requires
several cryptix jars for decryption.
The jar definitions are defined within the SUs pom.xml as
<dependency>
<groupId>cryptix</groupId>
<artifactId>cryptix-jce-api</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>cryptix</groupId>
<artifactId>certpath-api-compat</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>cryptix</groupId>
<artifactId>cryptix-jce-provider</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>cryptix</groupId>
<artifactId>cryptix-message-api</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>cryptix</groupId>
<artifactId>cryptix-openpgp-provider</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>cryptix</groupId>
<artifactId>cryptix-pki-api</artifactId>
<version>1.0</version>
</dependency>
The SUs xbean.xml contains
<classpath>
<location>lib/certpath-api-compat-1.0.jar</location>
<location>lib/cryptix-jce-api-1.0.jar</location>
<location>lib/cryptix-jce-provider-1.0.jar</location>
<location>lib/cryptix-message-api-1.0.jar</location>
<location>lib/cryptix-openpgp-provider-1.0.jar</location>
<location>lib/cryptix-pki-api-1.0.jar</location>
<location>.</location>
</classpath>
These jars are being included in the deployment jar and in the
servicemix/data directory I see the service unit expanded with the
jars
in the SUs exploded lib directory.
The page http://servicemix.apache.org/classloaders.html leads me to
believe that I am doing this correctly.
When this service runs I get java.lang.NoClassDefFoundError:
cryptix/message/MessageException.
Can anyone shed light on this issue?
Thanks in advance,
Gordon Dickens
--
Cheers,
Guillaume Nodet
------------------------
Blog: http://gnodet.blogspot.com/
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