'GinjectorGenerator' threw an exception while rebinding '...ClientGinjector' - google-app-engine

Question

I'm getting this error when running my web application that use GWT, GWT-Platform and App engine:
Generator 'com.google.gwt.inject.rebind.GinjectorGenerator' threw an
exception while rebinding 'com.myapp.client.gin.ClientGinjector'
My application have these jars in the WEB-INF/lib folder:
guice-3.0.jar
gin-1.5-post-gwt-2.2.jar
guice-servlet-3.0.jar
gwtp-all-0.7.jar
Here's the detailed error log of Development Mode:
[DEBUG] [app] - Validating newly compiled units [DEBUG] [app] -
Rebinding com.myapp.client.gin.ClientGinjector [DEBUG] [app] -
Invoking generator com.google.gwt.inject.rebind.GinjectorGenerator
[ERROR] [app] - Generator
'com.google.gwt.inject.rebind.GinjectorGenerator' threw an exception
while rebinding 'com.myapp.client.gin.ClientGinjector'
[ERROR] [app] - Deferred binding failed for
'com.myapp.client.gin.ClientGinjector'; expect subsequent failures
[ERROR] [app] - Failed to create an instance of
'com.myapp.client.MainAppEntryPoint' via deferred binding
[ERROR] [app] - Unable to load module entry point class
com.myapp.client.MainAppEntryPoint (see associated exception for
details)
[ERROR] [app] - Failed to load module 'app' from user agent
'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.11 (KHTML, like Gecko)
Chrome/20.0.1132.57 Safari/536.11' at 127.0.0.1:53782
I've been trying to figure out what could have been missing in my application but I still can't find the fix? What is causing this kind of error?

Answer 1

Often times this is due to adding non gwt supported types or imports such as java.net.* etc in your client folders of a gwt project. Only java types that are supported in the gwt white list are supported and can be searialized. the rebinding errors mask those errors. So comb through your project and see if you have those types and imports included in either client or shared folders