Question about setting GWT RPC timeout

Dear gurus,

I'm learning Java and GWT and I'm facing a problem with setting timeout for PRC calls. I want to extend the RPC timeout before the client reports a failure. The code I'm using is attached below.

I'm running a client in firefox and experience the following problem:

I want to achieve a timeout of 20-30 seconds. However I can set the timeout (RPC_TIMEOUT_MS) only up to 3200mS. In case the server does not respond I receive the exception "com.google.gwt.http.client.RequestTimeoutException: A request timeout has expired after 3200 ms" accurately after defined time.

However in case set timeout exceeds the 3300ms of above the exception is different "com.google.gwt.user.client.rpc.StatusCodeException: 0" and is thrown always after 3-4 seconds.

What causes this exception and how can I extend the waiting time?

Thank you,

Best regards

Dmitri

The code:

public class MyClass implements EntryPoint {

  private static final int RPC_TIMEOUT_MS = 3300;

  private static class TimeoutRequestBuilder extends RpcRequestBuilder {
    @Override
    protected RequestBuilder doCreate(String serviceEntryPoint) {
  RequestBuilder builder = super.doCreate(serviceEntryPoint);
      builder.setTimeoutMillis(RPC_TIMEOUT_MS);
      return builder;
    }
  }

  private static final RpcRequestBuilder requestBuilder = new TimeoutRequestBuilder();
  private final HubServiceAsync myService = GWT.create(HubService.class);

  @Override
  public void onModuleLoad() {
    ((ServiceDefTarget) hmyService).setRpcRequestBuilder(requestBuilder);

    final MainView mainView = new MainView(hubService);

    RootPanel rootPanel = RootPanel.get();
    rootPanel.add(mainView);

    Window.addResizeHandler(new ResizeHandler() {
      @Override
      public void onResize(ResizeEvent event) {
        mainView.resize();
      }
    });
  }
}

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