WebLogic Filtering Classloader Fails After Upgrade
Last updated on MAY 30, 2017
Applies to:Oracle WebLogic Server - Version 188.8.131.52.0 and later
Information in this document applies to any platform.
A filtering classloader is being used to separate the application build of a library from the build of the same library in WebLogic Server (WLS) itself. In the sample case, this was the OpenSAML library, but it could be any other library as well. After a WLS upgrade, the filtering classloader stopped working, and ClassNotFoundExceptions were seen. For example:
In this example, the classname used by the application is org.opensaml.ws.soap.soap11.impl.BodyBuilder (note the ws segment), so the filtering classloader is trying to load the wrong class.
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