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From Dain Sundstrom <>
Subject Re: Head-scratching dependency problem
Date Wed, 06 Sep 2006 18:39:31 GMT
I'd drop a break point near where the NoClassDefFoundError is thrown  
and inspect class loader.  My guess is that Aaron is right and some  
code is attempting to instantiate an orb from a class loader higher  
up in the hierarchy.  Also if you have overridden the RMI settings  
you will have to put the yoko classes in the rmi-naming plan since  
that plan starts an RMI registry.


On Sep 6, 2006, at 11:28 AM, Aaron Mulder wrote:

> It may be that the ORBConfigAdapter is included in the class path of
> one of the parents of j2ee-corba, but the Yoko classes are only
> included in j2ee-corba...  So in other words, the ORBConfigAdapter may
> be loaded from a higher CL than Yoko, so it may not be able to see
> Yoko classes unless you move Yoko up or move ORBConfigAdapter down.
> Thanks,
>     Aaron
> On 9/6/06, Rick McGuire <> wrote:
>> I'm working my way toward getting a full Geronimo build with the Yoko
>> ORB, which means a lot of changes to the various plans.  In the
>> client-corba plan, I have the following GBean definition:
>>     <gbean name="ORBConfigAdapter"
>> class="org.openejb.corba.yoko.ORBConfigAdapterGBean"/>
>> The ORBConfigAdapterGBean is a new bean that encapsulates the
>> configuration knowledge of the target ORB implementation.  As you  
>> might
>> expect, this has a few references to Yoko-specific classes.  While
>> trying to build this config, I got a NoClassDefFoundError trying  
>> to load
>> one of the Yoko classes.  Obviously a dependency problem, so I  
>> added the
>> following dependency to the client-corba/pom.xml file:
>>         <dependency>
>>             <groupId>org.apache.yoko</groupId>
>>             <artifactId>yoko-core</artifactId>
>>         </dependency>
>> Problem solved, the config built properly and the build sped along  
>> until
>> it hit the j2ee-corba config.  This config has the same  
>> ORBConfigAdapter
>> GBean defined.  Not surprisingly, I got the same NoClassDefFoundError
>> for the same class when trying to retrieve the GBeanInfo.  Doh!  This
>> should be the same fix as the client-corba problem, so I added the  
>> same
>> dependency lines to j2ee-corba/pom.xml.  This time, the error does  
>> NOT
>> go away :-(  The dependency is showing up in the generated
>> target/plan/plan.xml file with the correct version number, the
>> NoClassDefFoundError seems to be very persistent.  I've run out of  
>> ideas
>> on how to fix or debug this problem.  Any suggestions on what  
>> might be
>> going wrong?
>> Rick

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