Déploiement impossible sur google apps : No source code is available for type javax.servlet.http.HttpServlet;

Bonjour,

J'ai une application qui fonctionne correctement en local, mais lorsque j'essaie de déployer sur le google apps engine, j'ai les erreurs suivantes :

Code:

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Compiling module org.magnetik.semola.Org_magnetik
   Validating newly compiled units
      Ignored 1 unit with compilation errors in first pass.
Compile with -strict or with -logLevel set to TRACE or DEBUG to see all errors.
   Finding entry point classes
      [ERROR] Errors in 'file:/C:/Users/magnetik/git/semola-rdf/org.magnetik/src/org/magnetik/semola/client/RDFServlet.java'
         [ERROR] Line 13: No source code is available for type javax.servlet.http.HttpServlet; did you forget to inherit a required module?
         [ERROR] Line 16: No source code is available for type javax.servlet.http.HttpServletRequest; did you forget to inherit a required module?
         [ERROR] Line 16: No source code is available for type javax.servlet.http.HttpServletResponse; did you forget to inherit a required module?
         [ERROR] Line 25: No source code is available for type com.hp.hpl.jena.rdf.model.Model; did you forget to inherit a required module?
         [ERROR] Line 25: No source code is available for type com.hp.hpl.jena.rdf.model.ModelFactory; did you forget to inherit a required module?
         [ERROR] Line 37: No source code is available for type java.io.ByteArrayInputStream; did you forget to inherit a required module?
      [ERROR] Unable to find type 'org.magnetik.semola.client.RDFServlet'
         [ERROR] Hint: Previous compiler errors may have made this type unavailable
         [ERROR] Hint: Check the inheritance chain from your module; it may not be inheriting a required module or a module may not be adding its source path entries properly

Les fichiers :
src/org/magnetik/semola/client/RDFServlet.java : http://pastebin.com/mARFWJ1d
src/org/magnetik/semola/Org_magnetik.gwt.xml : http://pastebin.com/Vei545K2
war/web.xml : http://pastebin.com/y5KKP64w

Je vois pas bien ce qui cloche.
Dispo si vous avez besoin de renseignement supplémentaires !

Merci d'avance !