WmEJBAdapter fails to fully load

The WmEJBAdapter package fails to fully load when IS is started. The following message is produced in the server.log. What is the basic problem?

Loading WmEJBAdapter package
Failure while loading service wm.ejbadapter.admin:shutDown: java.lang.NoClassDefFoundError: javax/ejb/RemoveException

Failure while loading service pub.ejbadapter:removeEJB: java.lang.NoClassDefFoundError: javax/ejb/RemoveException

Failure while loading service wm.ejbadapter.admin:startUp: java.lang.NoClassDefFoundError: javax/ejb/RemoveException

I hunted down the missing RemoveException class in a file named ejb.jar. I copied it into wm\IntegrationServer\lib\jars and restarted IS. The WmEJBAdapter package then loaded ok.

I would consider it a bug whereby a required class is not included during installation of the EJB adapter. Right?