@Override
                public void onException(Throwable e) {
                    //logger.error("Process exception in callback.", e);
                    ret.add(e.getClass());
                    latch.countDown();
                }
future try to get result wait a shorter time or just the same with specified timeout in invokeWithFuture
src/test/java/com/alipay/remoting/rpc/timeout/TimeoutTest.java