RemotingCommand responseCommand = responseFuture.waitResponse(timeoutMillis);
if (null == responseCommand) {
// 发送请求成功,读取应答超时
if (responseFuture.isSendRequestOK()) {
throw new RemotingTimeoutException(RemotingHelper.parseChannelRemoteAddr(channel),
timeoutMillis, responseFuture.getCause());
}
// 发送请求失败
else {
throw new RemotingSendRequestException(RemotingHelper.parseChannelRemoteAddr(channel),