I think nothing is wrong on your application unless for example you put in your ear some old libraries of WebLogic (i.e. weblogic.jar) but I don't see any reason to do that....
com/bea/wlw/runtime/core/bean/SLSBContainerBean is an internal class used by WebLogic to manage stateless session bean componen.
As Javadoc says regarding the NoClassDefFoundError :
Thrown if the Java Virtual Machine or a ClassLoader instance tries to load in the definition of a class (as part of a normal method call or as part of creating a new instance using the new expression) and no definition of the class could be found.
The searched-for class definition existed when the currently executing class was compiled, but the definition can no longer be found.
So, at the end, a WebLogic class
is trying to load / define
and this class definition is not found so I think you can do nothing with that....check the thing I mentioned before (old libraries) and check your WebLogic installation.