code: @Test public void test_Ex_Onthrow() throws Exception {
    initOrResetUrl(true);
    initImplicitCallBackURL_onlyOnthrow();
    destroyService();
    exportExService();
    referService();
    int requestId=2;
    Person ret=demoProxy.get(requestId);
    Assert.assertEquals(null,ret);
    for (int i=0; i < 10; i++) {
      if (!notify.errors.containsKey(requestId)) {
        Thread.sleep(200);
      }
   else {
        break;
      }
    }
    Assert.assertTrue(notify.errors.containsKey(requestId));
    Assert.assertTrue(notify.errors.get(requestId) instanceof Throwable);
    destroyService();
  }
  