IncompatibleRemoteServiceException: The response could not be deserialized

[leslie]

I am able to run my application on the Mac in hosted mode with no
problems.

Mac OS X 10.5.8
Java version - 1.5.024
Eclipse Galileo 3.5
GWT 2.0.3
Safari 4

Running on Windows in hosted mode is another story.

Windows XP service pack 3
Java version 1.6.0.17
Eclipse Helio 3.6
GWT 2.0.3
Internet Explorer 8.0.6001

I see an exception thrown when I attempt to retrieve data from the
server. The stack in the Console is:

com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException: The
response could not be deserialized
at
com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceived(RequestCallbackAdapter.java:
204)
at
com.google.gwt.http.client.Request.fireOnResponseReceived(Request.java:
287)
at com.google.gwt.http.client.RequestBuilder
$1.onReadyStateChange(RequestBuilder.java:393)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
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.java:
157)
at
com.google.gwt.dev.shell.BrowserChannel.reactToMessagesWhileWaitingForReturn(BrowserChannel.java:
1713)
at
com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:
165)
at
com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:
120)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:
507)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:
264)
at
com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:
91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:188)
at sun.reflect.GeneratedMethodAccessor25.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
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.java:
157)
at
com.google.gwt.dev.shell.BrowserChannel.reactToMessages(BrowserChannel.java:
1668)
at
com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:
401)
at
com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:
222)
at java.lang.Thread.run(Unknown Source)
Caused by: com.google.gwt.user.client.rpc.SerializationException:
at
com.google.gwt.user.client.rpc.impl.SerializerBase.check(SerializerBase.java:
161)
at
com.google.gwt.user.client.rpc.impl.SerializerBase.instantiate(SerializerBase.java:
138)
at
com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader.deserialize(ClientSerializationStreamReader.java:
114)
at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamReader.readObject(AbstractSerializationStreamReader.java:
61)
at
myClassFile.PersonImpl_FieldSerializer.deserialize(PersonImpl_FieldSerializer.java:
137)


So there is some issue at line 137 in a generated class
PersonImpl_FieldSerializer ? It runs fine online and in my other
environment. That is, I can run it in IE 8 after it has
been published up to a remote server. How do I debug/resolve this?

[leslie]

I believe I resolved this a while ago. I think the issue pertained to
the use of the drop down "combobox" list box in GWT. If I recall In
IE 8 it was throwing an exception if I was attempting to obtain the
value in the box if the selected index was -1 but somehow no exception
was generated in Safari. At least I think that may have been the
issue but I don't remember exactly so I could be wrong.