A.Modify the applications to use the same version that WebLogic uses internally.
B.Based on available examples of Filtering Classloader entries, try to modify get the proper  entries.
C.Deploy and use the Classloader Analyzing Tool to resolve all conflicts with conflicting libraries.  This tool will generate all proper entries.
D.Split the application into separate WebLogic containers and use different WLS versions of  Xerces but identical that applications require.
E.Look for a WebLogic release that uses the same version of Xerces that the applications use.

A.execution of unit and integration tests
B.management of the life cycle of a WebLogic domain including creation, configuration, and server life-cycle management
C.deployment and undeployment of applications
D.Java profiling