Problem with configuring servletModule with Guice injecting GWT RequestFactory

I want to use GUICE on the server side with the GWT 2.3 RequestFactory. I have my class that extends the ServletModule with :

@Override
public void configureServlets() {
  // RequestFactory servlet
  bind(RequestFactoryServlet.class).in(Singleton.class);
  serve("/gwtRequest").with(RequestFactoryServlet.class);
}

and in the web.xml I have added :

<filter>
    <filter-name>guiceFilter</filter-name>
    <filter-class>com.google.inject.servlet.GuiceFilter</filter-class>
</filter>

<filter-mapping>
    <filter-name>guiceFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

and I have the validation-api.XXX.jar referenced (as it is part of GWT)

When I run it (under Eclipse with the GWT plugin), it says:

jetty-6.1.x [WARN] failed guiceFilter: com.google.inject.ProvisionException: Guice provision errors:

1) Error injecting constructor, java.lang.NoClassDefFoundError: javax/validation/ValidationException at com.google.web.bindery.requestfactory.server.RequestFactoryServlet.(RequestFactoryServlet.java:74) at com.djay.eyeandtrack.server.EatServletModule.configureServlets(EatServletModule.java:13) while locating com.google.web.bindery.requestfactory.server.RequestFactoryServlet

1 error [WARN] Failed startup of context com.google.apphosting.utils.jetty.DevAppEngineWebAppContext@17b3de2{/,C:\5_DJAY\03_EYEANDTRACK\branches\djaysbox\EyeAndTrack\war} com.google.inject.ProvisionException: Guice provision errors:

1) Error injecting constructor, java.lang.NoClassDefFoundError: javax/validation/ValidationException at com.google.web.bindery.requestfactory.server.RequestFactoryServlet.(RequestFactoryServlet.java:74) at com.djay.eyeandtrack.server.EatServletModule.configureServlets(EatServletModule.java:13) while locating com.google.web.bindery.requestfactory.server.RequestFactoryServlet

1 error at com.google.inject.internal.InjectorImpl$4.get(InjectorImpl.java:987) at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1009) at com.google.inject.servlet.ServletDefinition.init(ServletDefinition.java:108) at com.google.inject.servlet.ManagedServletPipeline.init(ManagedServletPipeline.java:82) at com.google.inject.servlet.ManagedFilterPipeline.initPipeline(ManagedFilterPipeline.java:102) at com.google.inject.servlet.GuiceFilter.init(GuiceFilter.java:172) at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:662) at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:224) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:186) at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:157) at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:169) at com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:119) at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:500) at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1055) at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:804) at com.google.gwt.dev.DevMode.main(DevMode.java:309) Caused by: java.lang.NoClassDefFoundError: javax/validation/ValidationException at com.google.web.bindery.requestfactory.server.ServiceLayer.create(ServiceLayer.java:74) at com.google.web.bindery.requestfactory.server.RequestFactoryServlet.(RequestFactoryServlet.java:88) at com.google.web.bindery.requestfactory开发者_Python百科.server.RequestFactoryServlet.(RequestFactoryServlet.java:74) at com.google.web.bindery.requestfactory.server.RequestFactoryServlet$$FastClassByGuice$$54253391.newInstance() at com.google.inject.internal.cglib.reflect.$FastConstructor.newInstance(FastConstructor.java:40) at com.google.inject.internal.DefaultConstructionProxyFactory$1.newInstance(DefaultConstructionProxyFactory.java:60) at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:85) at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:254) at com.google.inject.internal.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:46) at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1031) at com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40) at com.google.inject.Scopes$1$1.get(Scopes.java:65) at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:40) at com.google.inject.internal.InjectorImpl$4$1.call(InjectorImpl.java:978) at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1024) at com.google.inject.internal.InjectorImpl$4.get(InjectorImpl.java:974) ... 26 more Caused by: java.lang.ClassNotFoundException: javax.validation.ValidationException at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:176) at java.lang.ClassLoader.loadClass(Unknown Source) ... 42 more

I'm probably missing something but I don't knwo where to look... Thanks

Is validation-api.jar in your war/WEB-INF/lib? (you say "referenced", which might not be enough)