com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException

Question

I have a problem with my GWT application. I deploy on Jetty server and it runs. But when I perform a server call (class on server package of GWT), the server returns an error message. The message is:

7|0|6|http://localhost/zbapp/zb_app/|A31E1254E17F9AD731856D6BE34124A2|main.java.com.gwt.app.client.GreetingService|greetServer|java.lang.String/2004016611||1|2|3|4|2|5|5|6|6|
//EX[2,1,["com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException/3936916533","This application is out of date, please click the refresh button on your browser. ( Expecting version 5 from client, got 7. )"],0,5]

However, the server returns a 200 code that is OK.

I have updated the browser, clear up browser cache and recompiled the application, but it does not run. What is the solution for that??

Thanks in advance!

Regards!

Answer 1

Your client is uptodate, as it sends a request using version 7 of the GWT-RPC protocol, but the server expects version 5. Check that you deployed the correct version of gwt-servlet.jar, and/or that you don't have an older version in your server classpath that would be used instead of the one from your webapp.

More specifically, you have a gwt-servlet.jar from GWT between 1.5 and 2.0 (version 5 of the GWT-RPC protocol) while your client code has been compiled with GWT 2.1 or newer (version 7 of the protocol).