about Failover Retry

[lfygh]

com.alipay.sofa.jraft.rhea.client.DefaultRheaKVRpcService#internalCallAsyncWithRpc

private <V> void internalCallAsyncWithRpc(final Endpoint endpoint, final BaseRequest request,
                                              final FailoverClosure<V> closure) {
        final InvokeContext invokeCtx = new InvokeContext();
        invokeCtx.put(BoltRpcClient.BOLT_CTX, ExtSerializerSupports.getInvokeContext());
        final InvokeCallback invokeCallback = new InvokeCallback() {

            @Override
            public void complete(final Object result, final Throwable err) {
                if (err == null) {
                    final BaseResponse<?> response = (BaseResponse<?>) result;
                    if (response.isSuccess()) {
                        closure.setData(response.getValue());
                        closure.run(Status.OK());
                    } else {
                        closure.setError(response.getError());
                        closure.run(new Status(-1, "RPC failed with address: %s, response: %s", endpoint, response));
                    }
                } else {
                    closure.failure(err);
                }
            }

            @Override
            public Executor executor() {
                return rpcCallbackExecutor;
            }
        };

        try {
            this.rpcClient.invokeAsync(endpoint, request, invokeCtx, invokeCallback, this.rpcTimeoutMillis);
        } catch (final Throwable t) {
            closure.failure(t); //
        }
    }

com.alipay.remoting.exception.ConnectionClosedException: Connection closed when invoke with callback.The address is 172.168.0.64:8883
java.util.concurrent.ExecutionException: com.alipay.remoting.exception.ConnectionClosedException: Connection closed when invoke with callback.The address is 172.168.0.64:8883