SOA11g DBAdapter - Package Body has been invalidated

 Problem:

 SOA via dbadapter calls a parent API.
 This Parent API can inturn call child APIs.
 The child API was recompiled and is in a valid state at the database layer.
 
 The DB Adapter fails with the following message:

 ORA-04061: existing state of package body "APPS.XYZ" has been invalidated
 ORA-04065: not executed, altered or dropped package body "APPS.XYZ"
 ORA-06508: PL/SQL: could not find program unit being called: "APPS.XYZ"

 Solution:

 This is a caching issue.
 Either recompile the package again at the database side or bounce the SOA Managed server.