Running GWT-2.0 with App Engine (Mac OS X)

At least on trunk’s revision 5967 GWT HostedMode with AppEngineLauncher fails to start.

If you’re getting something like:

failed com.google.apphosting.utils.jetty.DevAppEngineWebAppContext@3225c9{/,.}
javax.xml.parsers.FactoryConfigurationError: Provider                                     ↩
  org.apache.xerces.jaxp.SAXParserFactoryImpl not found

Just add xercesImpl.jar to

/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home/lib/endorsed

You can get it from GWT build tools at tools/lib/xerces/xerces-2_9_1

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