FIX: Could not load default SAX Parser: org.apache.xerces.parsers.SAXParser: SAX2 driver class
I'm trying to manipulate xml in GAE. It works fine in the local webserver but get this error in GAE.
To fix it I downloaded the xerces zip file (which I probably already have :) from here:
http://www.apache.org/dist/xerces/j/. Once it is added to the web-inf\lib folder and deployed the error is fixed.