NoClassDefFoundError When Accessing Class from EJB (from WD)

[detlev_beutner]

Hi there,

Already posted within the WD forum, but absolute no comment so far... maybe here it will fit better. This one drives me crazy (but maybe, I'm overlooking some simple setting...):

We have a WD project, an EAR project, an EJB project. Within the EJB project, we have some EJB and some helper classes.

Problem: The WD calls the EJB, and when within the EJB a helper class should get into the game, a NoClassDefFoundError is thrown. This is really strange in my eyes, as the EJB itself could be resolved and we are talking of a class within the same JAR!

The WD project has a SharingReference to the EAR project. The EAR encapsulates the EJB JAR, and this definitely contains the class the server later is complaining about.

The stack trace is like this:

com.sap.engine.services.ejb.exceptions.BaseEJBException: Exception in method getList.
	at com.xxx.sessionfacade.ejb.ManagerSBLocalLocalObjectImpl0_0.getList(ManagerSBLocalLocalObjectImpl0_0.java:191)
	at com.xxx.client.bd.SomeBD.getTrackingList(TrackingBD.java:68)
	[...]
	at com.sap.tc.webdynpro.progmodel.context.Node.supplyElements(Node.java:403)
	at com.sap.tc.webdynpro.progmodel.context.Node.getElementList(Node.java:346)
	at com.sap.tc.webdynpro.progmodel.context.Node.getElements(Node.java:334)
	at com.sap.tc.webdynpro.progmodel.context.Node.size(Node.java:718)
	at com.xxx.wd.MainComp.filter(MainComp.java:298)
	[...]
	at com.sap.tc.webdynpro.progmodel.generation.DelegatingComponent.doInit(DelegatingComponent.java:95)
	[...]
Caused by: java.lang.NoClassDefFoundError: com.xxx.business.dao.SomeDAO
	at java.lang.Class.initialize(Class.java:307)
	at com.xxx.sessionfacade.ejb.ManagerSBBean.getList(ManagerSBBean.java:75)
	[...]
	at com.sap.tc.webdynpro.progmodel.context.Node.supplyElements(Node.java:403)
	at com.sap.tc.webdynpro.progmodel.context.Node.getElementList(Node.java:346)
	at com.sap.tc.webdynpro.progmodel.context.Node.getElements(Node.java:334)
	at com.sap.tc.webdynpro.progmodel.context.Node.size(Node.java:718)
	at com.xxx.wd.MainComp.filter(MainComp.java:298)
	[...]
	at com.sap.tc.webdynpro.progmodel.generation.DelegatingComponent.doInit(DelegatingComponent.java:95)
	[...]

com.xxx.wd.* comes from the WD project; com.xxx.sessionfacade.ejb.ManagerSBBean comes from the EJB project, as com.xxx.business.dao.SomeDAO does, too!

Already restartet the server --- and no, the classloaders don't seem to have had a simple hiccough

Thanks in advance & best regards

Detlev

[detlev_beutner]

Resolved. For details see