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Google Cloud Pubsub数据丢失

我遇到了GCP pubsub的一个问题，在几秒钟内发布数千条消息时，一小部分数据丢失了。
我正在记录来自pubsub的message_id和一个会话.

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当应用程序有一天没有激活时，iPhone上不会出现GCM推送通知

在iPhone/iPad上安装应用程序后，应用程序能够第一次收到通知。一旦应用程序处于非活动状态，它就会停止在前台和后台收到通知。
有人可以po.

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