NoClassDefFoundError: wrong name

Solution Verified - Updated -

Issue

We are seeing a strange form of classloader error that says "wrong name", what is the cause of this?
java.lang.NoClassDefFoundError: MyClass (wrong name: com/mycompany/MyClass)

Environment

  • JBoss Enterprise Application Platform (EAP) 5.x
  • JBoss Enterprise Application Platform (EAP) 4.x

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