In FileUploadServlet.java the execute() method doesn't pass the RESTORE_VIEW phase because the VIEW_STATE_PARAM parameter required by GlassFish JSF 1.2 implementation to think it's a postBack, is not encoded in FileUploadServlet.
There should have been a similar code in FileUploadServlet.java like in BlockingServlet.java where you have:

BlockingServlet.java:

static {
        //We will place VIEW_STATE_PARAM in the requestMap so that
        //JSF 1.2 doesn't think the request is a postback and skip
        //execution
        try {
            Field field = javax.faces.render.ResponseStateManager.class.getField("VIEW_STATE_PARAM");
            if (null != field) {
                postBackKey = (String) field.get(javax.faces.render.ResponseStateManager.class);
            }
        } catch (Exception e) {
        }
    }

....

void renderCycle(BridgeFacesContext context, Lifecycle lifecycle) {
        synchronized (context) {
            context.setCurrentInstance();
            DOMResponseWriter.applyBrowserDOMChanges(context);

//Here is where the key is being set into the external context
            if (null != postBackKey) {
                context.getExternalContext().getRequestParameterMap()
                        .put(postBackKey, "not reload");
            }

            lifecycle.execute(context);
            lifecycle.render(context);
            context.release();
        }
    }