I Know this is old but I just got stuck with the same problem. Did you ever 
got around this and solved it?

I'm really frustrated, I've tried everything I knew of, everything any blog 
speaks of and still no validation run!

PLEASE HELP!!!

On Sunday, January 15, 2012 12:32:56 AM UTC-2, TULC wrote:
>
> I'm still stuck on this.  Some projects I've ported to 2.4 now work, 
> but others still just won't budge.  I have tried all the additional 
> steps, but my *DeobfuscatorBuilder.java just won't appear in those 
> projects (event thought the .apt_generated folder does, and is 
> replaced if I change the name).  I have noticed some (though not all) 
> of those projects are now giving me the error "build.properties does 
> not exist", which may or may not be related. 
>
> I'm frustrated to the point I'm considering ditching GWT altogether; I 
> haven't been able to proceed with any GWT development since the 2.4 
> upgrade.  Like the man said, I'm good, really I am, but I just can't 
> figure this one out, and it really shouldn't be this hard.  Thanks for 
> the breaking change. 
>
> Evan 
>
>
> On Dec 14 2011, 12:12 pm, dparish <dpar...@gmail.com> wrote: 
> > I had the same problem. There are two other possible reasons you see 
> > this: 
> > 
> > 1. Your java compliance level in the project is set to 1.5 
> > 2. Your classes are already compiled.  I don't know why, but touching 
> > the my RequestContext classes had NO affect until I deleted the 
> > classes that were compiled before I added annotations.  Now it all 
> > works just fine. 
> > 
> > Attention Google: 
> > This stuff is waaaayyyy tooo complicated.  I'm good. really I am, but 
> > this is just misdirection at it's worst. 
> > 
> > On Nov 20, 5:47 pm, oerten25 <ozgur.er...@gmail.com> wrote: 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > > I've been getting the same error and tried the things mentioned in the 
> > > discussion without any luck. Finally i realised that i don't have the 
> > > "apt_generated" folder. So i changed the "generated source directory" 
> > > option to something other than "apt_generated" in Annotation 
> > > Processing setting. That fixed it. 
> > 
> > > On Oct 2, 11:29 pm, TULC <evan.a.te...@gmail.com> wrote: 
> > 
> > > > I just get the sameerroras posted by Eric at the beginning of the 
> > > > thread, but I have copied/pasted the full dump below. 
> > 
> > > > Thomas, I'm not sure what you mean about the .apt_generated being in 
> > > > my build path? 
> > 
> > > > Thanks for the help, guys... 
> > > > Evan 
> > 
> > > > Console: 
> > > > log4j:WARN No appenders could be found for logger 
> > > > (org.apache.jasper.compiler.Js 
> > > > pRuntimeContext). 
> > > > log4j:WARN Please initialize the log4j system properly. 
> > > > log4j:WARN Seehttp://logging.apache.org/log4j/1.2/faq.html#noconfig 
> > > > for more in 
> > > > fo. 
> > > > 03/10/2011 8:24:49 AM 
> > > > com.google.web.bindery.requestfactory.server.RequestFactor 
> > > > yServlet doPost 
> > > > SEVERE: Unexpectederror 
> > > > java.lang.RuntimeException: 
> TheRequestFactoryValidationToolmustberunfor th 
> > > > e com.google.gwt.sample.dynatablerf.shared.DynaTableRequestFactory 
> > > > RequestFactor 
> > > > y type 
> > > >         at 
> com.google.web.bindery.requestfactory.vm.impl.Deobfuscator 
> > > > $Builder.load(Deob 
> > > > fuscator.java:59) 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.server.ResolverServiceLayer.updateDeo 
> b 
> > > > fuscator(ResolverServiceLayer.java:43) 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.server.ResolverServiceLayer.resolveRe 
> q 
> > > > uestFactory(ResolverServiceLayer.java:176) 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.resolveR 
> e 
> > > > questFactory(ServiceLayerDecorator.java:172) 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.resolveR 
> e 
> > > > questFactory(ServiceLayerDecorator.java:172) 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.resolveR 
> e 
> > > > questFactory(ServiceLayerDecorator.java:172) 
> > > >         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native 
> Method) 
> > > >         at 
> > > > 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: 
> > > > 39 
> > > > ) 
> > > >         at 
> > > > 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp 
> l 
> > > > .java:25) 
> > > >         at java.lang.reflect.Method.invoke(Method.java:597) 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.server.ServiceLayerCache.getOrCache(S 
> e 
> > > > rviceLayerCache.java:233) 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.server.ServiceLayerCache.resolveReque 
> s 
> > > > tFactory(ServiceLayerCache.java:198) 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process 
> ( 
> > > > SimpleRequestProcessor.java:207) 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process 
> ( 
> > > > SimpleRequestProcessor.java:127) 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.server.RequestFactoryServlet.doPost(R 
> e 
> > > > questFactoryServlet.java:133) 
> > > >         at 
> javax.servlet.http.HttpServlet.service(HttpServlet.java:637) 
> > > >         at 
> javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
> > > >         at 
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: 
> > > > 487) 
> > > >         at org.mortbay.jetty.servlet.ServletHandler 
> > > > $CachedChain.doFilter(ServletHandler 
> > > > .java:1097) 
> > > >         at 
> > > > 
> com.google.gwt.sample.dynatablerf.server.SchoolCalendarService.doFilter(Sch 
> o 
> > > > olCalendarService.java:89) 
> > > >         at org.mortbay.jetty.servlet.ServletHandler 
> > > > $CachedChain.doFilter(ServletHandler 
> > > > .java:1088) 
> > > >         at 
> > > > org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java: 
> > > > 360) 
> > > >         at 
> > > > 
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java: 
> > > > 216) 
> > > >         at 
> > > > org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java: 
> > > > 181) 
> > > >         at 
> > > > org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java: 
> > > > 729) 
> > > >         at 
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java: 
> > > > 405) 
> > > >         at 
> > > > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java: 
> > > > 152) 
> > > >         at 
> > > > 
> org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java: 
> > > > 49 
> > > > ) 
> > > >         at 
> > > > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java: 
> > > > 152) 
> > > >         at org.mortbay.jetty.Server.handle(Server.java:324) 
> > > >         at 
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: 
> > > > 505) 
> > > >         at org.mortbay.jetty.HttpConnection 
> > > > $RequestHandler.content(HttpConnection.java: 
> > > > 843) 
> > > >         at 
> org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647) 
> > > >         at 
> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:205) 
> > > >         at 
> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380) 
> > > >         at 
> > > > 
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java: 
> > > > 395) 
> > > >         at org.mortbay.thread.QueuedThreadPool 
> > > > $PoolThread.run(QueuedThreadPool.java:488 
> > > > ) 
> > > > [ERROR]500- POST /gwtRequest (127.0.0.1) 1420 bytes 
> > > >    Request headers 
> > > >       Host: 127.0.0.1:8888 
> > > >       Connection: keep-alive 
> > > >       Content-Length: 163 
> > > >       Origin:http://127.0.0.1:8888 
> > > >       X-GWT-Permutation: HostedMode 
> > > >       pageurl:
> http://127.0.0.1:8888/DynaTableRf.html?gwt.codesvr=127.0.0.1:9997 
> > > >       User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.2 
> > > > (KHTML, like Ge 
> > > > cko) Chrome/15.0.854.0 Safari/535.2 
> > > >       Content-Type: application/json; charset=UTF-8 
> > > >       Accept: */* 
> > > >       Referer:
> http://127.0.0.1:8888/DynaTableRf.html?gwt.codesvr=127.0.0.1:9997 
> > > >       Accept-Encoding: gzip,deflate,sdch 
> > > >       Accept-Language: en-US,en;q=0.8,en-AU;q=0.6 
> > > >       Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 
> > > >       Cookie: Favorites= 
> > > >    Response headers 
> > > >       Content-Type: text/html; charset=iso-8859-1 
> > > >       Content-Length: 1420 
> > > > Mon Oct 03 08:24:50 EST 2011 WireActivityLogger 
> > > > SEVERE: ServerError500<html> 
> > > > <head> 
> > > > <metahttp-equiv="Content-Type" content="text/html; 
> > > > charset=ISO-8859-1"/> 
> > > > <title>Error500INTERNAL_SERVER_ERROR</title> 
> > > > </head> 
> > > > <body><h2>HTTPERROR:500</h2><pre>INTERNAL_SERVER_ERROR</pre> 
> > > > <p>RequestURI=/gwtRequest</p><p><i><small><a href="http:// 
> > > > jetty.mortbay.org/">Po 
> > > > wered by Jetty://</a></small></i></p><br/> 
> > 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > > > <br/> 
> > 
> > > > </body> 
> > > > </html> 
> > 
> > > > Development Mode window (also wired to console by default in 
> > > > DynaTableRf sample): 
> > > > Mon Oct 03 08:24:50 EST 2011 
> > > > com.google.gwt.sample.dynatablerf.client.DynaTableR 
> > > > f 
> > > > SEVERE: One or more exceptions caught, see full set in 
> > > > UmbrellaException#getCaus 
> > > > es 
> > > > com.google.web.bindery.event.shared.UmbrellaException: One or more 
> > > > exceptions ca 
> > > > ught, see full set in UmbrellaException#getCauses 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext.fa 
> i 
> > > > l(AbstractRequestContext.java:727) 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext 
> > > > $5.o 
> > > > nTransportFailure(AbstractRequestContext.java:1104) 
> > > >         at 
> > > > 
> com.google.web.bindery.requestfactory.gwt.client.DefaultRequestTransport 
> > > > $1.o 
> > > > nResponseReceived(DefaultRequestTransport.java:140) 
> > > >         at 
> > > > 
> com.google.gwt.http.client.Request.fireOnResponseReceived(Request.java: 
> > > > 287) 
> > > >         at com.google.gwt.http.client.RequestBuilder 
> > > > $1.onReadyStateChange(RequestBuilde 
> > > > r.java:395) 
> > > >         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native 
> Method) 
> > > >         at 
> > > > 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: 
> > > > 39 
> > > > ) 
> > > >         at 
> > > > 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp 
> l 
> > > > .java:25) 
> > > >         at java.lang.reflect.Method.invoke(Method.java:597) 
> > > >         at 
> com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java: 
> > > > 103) 
> > > >         at 
> com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java: 
> > > > 71) 
> > > >         at 
> > > > 
> com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.jav 
> a 
> > > > :172) 
> > > >         at 
> > > > 
> com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingFo 
> r 
> > > > Return(BrowserChannelServer.java:337) 
> > > >         at 
> > > > 
> com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChann 
> e 
> > > > lServer.java:218) 
> > > >         at 
> > > > 
> com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java: 
> > > > 136 
> > > > ) 
> > > >         at 
> com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java: 
> > > > 561) 
> > > >         at 
> > > > 
> com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java: 
> > > > 269 
> > > > ) 
> > > >         at 
> > > > 
> com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.j 
> a 
> > > > va:91) 
> > 
> > ... 
> > 
> > read more ยป

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