Xerces JAR on GAE project's classpath leads to “SAXParserFactoryImpl not found”
I'm using the Eclipse plugin for Google App Engine and I'm having a strange issue with a Xerces dependency. On of my classes depends on the Apache Xerces JAR which I have added to the project's classpath. This however, triggers an error when starting the Jetty app server: WARNING: failed com.google.apphosting.utils.jetty.DevAppEngineWebAppContext@6efde050 {/,/Users/lenni/dev/gate/war} javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found When I remove the xercesImpl.jar from my classpath jetty starts fine, however then my classes don't