Android GCM消息需要很长时间 [英] Android GCM messages take too long to come

问题描述

我大部分时间都会马上收到邮件，但有时邮件会在5几分钟之后，就像他们被困在路上一样。这是正常的吗？

解决方案

客户端手机上的GCM框架部分使用 TCP连接端口5228.该连接用于推送通知，但作为每个tcp连接，它可以与一些应用严格策略来终止非活动tcp连接（ tcp idle timeout ）的路由器/运营商超时。 p>

大多数wifi路由器在5分钟后杀死不活动的连接，例如我的。

GCM框架使用 keep-alive 机制每15分钟在wifi上发送心跳网络数据包，在3G上每28分钟发送一次心跳网络数据包。对于所有用户而言，这种保持活力并不总是可靠的。

我在此处向Google打开了此问题：
https://productforums.google.com/forum/#!category-topic/nexus/connecting-to -networks-and-devices / fslYqYrULto
他们同意目前存在问题。

I work with GCM in my application, and I have a problem.

Most of the time I get the messages right away, but sometimes the messages come after 5 minutes, one after another, like they got stuck on the way. Is this normal?

解决方案

The GCM framework part on the client phone use a TCP connection on the port 5228. This connection its used for push notifications, but as every tcp connection it can go on timeout with some routers/carriers that apply strict policies to kill inactive tcp connections (tcp idle timeout).

Most wifi routers kills inactive connections after 5 minutes for example, like mine.

The GCM framework use a keep-alive mechanism to send an heartbeat network packet every 15 minutes on wifi and every 28 minutes on 3G. This keep-alive is not always reliable for all users.

I opened the issue to google here: https://productforums.google.com/forum/#!category-topic/nexus/connecting-to-networks-and-devices/fslYqYrULto They agree there is currently an issue.

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