Problem looking up bean

Question

Hi,
I'm getting the following exception when trying to lookup a bean from another bean
java.lang.NullPointerException
at com.evermind.server.ejb.DelayedHomeBinding.getInstance(DelayedHomeBinding.java:44)
at com.evermind.naming.MapContext.lookup(MapContext.java:53)
at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:122)
at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:64)
at javax.naming.InitialContext.lookup(Unknown Source)
at com.smarthaven.component.taxonomy.TaxonomyEntityBean.ejbRemove(TaxonomyEntityBean.java:134)
at TaxonomyEntity_EntityBeanWrapper36.__removeCore(TaxonomyEntity_EntityBeanWrapper36.java:211)
at TaxonomyEntity_EntityBeanWrapper36.remove(TaxonomyEntity_EntityBeanWrapper36.java:162)
at java.lang.reflect.Method.invoke(Native Method)
at com.evermind.server.rmi.RMICallHandler.run(RMICallHandler.java:80)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:64)
I'm having two entity beans: a TaxonomyEntityBean and a TaxonomyNodeEntityBean. The TaxonomyEntityBean uses the TaxonomyNodeEntityBean when it's removed. Using a standalone testclient I'm creating one TaxonomyEntityBean and a couple of TaxonomyNodeEntityBeans. After that I'm REMOVING the TaxonomyEntityBean, which, in his turn, tries to lookup the TaxonomyNodeEntityBeanHome (to remove them as well). The second lookup (from bean to bean) fails. The lookup from the client to the first bean is done using JNDI, the second (in the server) is done using references. I'm sure the ejb-jar.xml file and the orion-ejb-jar.xml files are correct. Xml snippets from the TaxonomyEntity are shown below (TaxonomyNodeEntity works correctly, so left out). Also, some code is shown.
Could anybody help ;-)
thnx,
Alef
<!-- TAXONOMYENTITY (ejb-jar) -->
<entity id="TaxonomyEntity">
<ejb-name>smarthaven.taxonomy.TaxonomyEntity</ejb-name>
<home>com.smarthaven.component.taxonomy.TaxonomyEntityHome</home>
<remote>com.smarthaven.component.taxonomy.TaxonomyEntity</remote>
<ejb-class>com.smarthaven.component.taxonomy.TaxonomyEntityBean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.Long</prim-key-class>
<reentrant>True</reentrant>
<cmp-field id="smarthaven.taxonomy.TaxonomyEntity_id">
<field-name>id</field-name>
</cmp-field>
<cmp-field id="smarthaven.taxonomy.TaxonomyEntity_name">
<field-name>name</field-name>
</cmp-field>
<primkey-field>id</primkey-field>
<ejb-ref id="EjbRef_6">
<description>This is the link to the TaxonomyNodeEntity</description>
<ejb-ref-name>ejb/smarthaven/taxonomy/TaxonomyNodeEntity</ejb-ref-name>
<ejb-ref-type>Entity</ejb-ref-type>
<home>com.smarthaven.component.taxonomy.TaxonomyNodeEntityHome</home>
<remote>com.smarthaven.component.taxonomy.TaxonomyNodeEntity</remote>
<ejb-link>smarthaven.taxonomy.TaxonomyNodeEntity</ejb-link>
</ejb-ref>
<security-role-ref id="SecurityRoleRef_3">
<role-name>everyone</role-name>
<role-link>everyone</role-link>
</security-role-ref>
</entity>
<!-- TAXONOMYNODENTITY (orion-ejb-jar) -->
<entity-deployment name="smarthaven.taxonomy.TaxonomyEntity"
location="smarthaven/taxonomy/TaxonomyEntity" table="t_taxonomy" data-
source="jdbc/SmartHavenConnectionPool">
<primkey-mapping>
<cmp-field-mapping name="id" persistence-name="id"/>
</primkey-mapping>
<cmp-field-mapping name="name" persistence-name="name"/>
<finder-method query="">
<method>
<ejb-name>smarthaven.taxonomy.TaxonomyEntity</ejb-name>
<method-name>findAll</method-name>
</method>
</finder-method>
<finder-method query="$name = $1">
<method>
<ejb-name>smarthaven.taxonomy.TaxonomyEntity</ejb-name>
<method-name>findByName</method-name>
<method-params>
<method-param>java.lang.String</method-param>
</method-params>
</method>
</finder-method>
<finder-method query="$id = $1">
<method>
<ejb-name>smarthaven.taxonomy.TaxonomyEntity</ejb-name>
<method-name>findByTaxonomy</method-name>
<method-params>
<method-param>java.lang.Long</method-param>
</method-params>
</method>
</finder-method>
<ejb-ref-mapping location="smarthaven/taxonomy/TaxonomyNodeEntity"
name="ejb/smarthaven/taxonomy/TaxonomyNodeEntity"/>
</entity-deployment>
// CODE THAT LOOKS UP THE NODENTITYBEAN TO REMOVE THEM (this fails!)
TaxonomyNodeEntityHome nodeHome = null;
try {
Context context = new InitialContext();
// IT FAILS HERE (with the exception as shown above)
Object result = context.lookup("java:comp/env/ejb/smarthaven/taxonomy/TaxonomyNodeEntity);
nodeHome = (TaxonomyNodeEntityHome)PortableRemoteObject.narrow(
result, TaxonomyNodeEntityHome.class);
} catch (NamingException e) {
throw new EJBException("TaxonomyNodeEntityHome (bound to " +
"java:comp/env/ejb/smarthaven/taxonomy/TaxonomyNodeEntity" +
") could not be found");

Answer 1

OK,rebuilt all my code & deployed making sure it only referenced oc4j system classes and .... it made no difference.
Then I noticed the application.log for my application, when the client tries to connect get the following exception in the application.log:
04/01/02 15:32 Error creating home instance for Security
java.lang.NoClassDefFoundError: com/vwssys/drive/classes/exception/DriveException
     at SecurityHome_StatelessSessionHomeWrapper71.<init>(SecurityHome_StatelessSessionHomeWrapper71.java:7)
     at java.lang.Class.newInstance0(Native Method)
     at java.lang.Class.newInstance(Class.java:237)
     at com.evermind.server.ejb.deployment.SessionBeanDescriptor.createHomeInstance(SessionBeanDescriptor.java:78)
     at com.evermind.server.ejb.EJBPackageDeployment.getHomeInstance(EJBPackageDeployment.java:580)
     at com.evermind.server.ejb.DelayedHomeBinding.getInstance(DelayedHomeBinding.java:42)
     at com.evermind.server.rmi.RMIBinding.getValue(RMIBinding.java:33)
     at com.evermind.server.rmi.RMIContext.getBinding(RMIContext.java:845)
     at com.evermind.server.rmi.RMIContext.lookupLocalObject(RMIContext.java:660)
     at com.evermind.server.rmi.RMIConnection.handleLookupObject(RMIConnection.java:652)
     at com.evermind.server.rmi.RMIConnection.run(RMIConnection.java:391)
     at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:64)
04/01/02 15:34 Error creating home instance for Security
Now com/vwssys/drive/classes/exception/DriveException
is one my supporting classes, all of which I have jarred up into a jar file vwsclasses.jar and put into the j2ee/home/lib directory so that deployed ejbs should pick them up but it has not.
I then added it to the ejbSecurity.jar but it has not made any difference.
Any Ideas ?
thanks paul