Multiple iPhone APN messages, single connection

Question

I have a strange issue. I\'m trying to get Apple Push Notifications working with Python. I can connect and send individual messages without a problem. The issues pop up when

Answer 1

Apple will silently drop your connection if it receives an invalid device token or a message that's too long. The next couple of messages after that will fail because they're just sent into the ether, essentially - the connection is closed, but the TCP window isn't exhausted.

At Urban Airship, where I work, we have a debug mode to use when people test their applications with push on our service. This will pause for a little bit after sending a message to ensure that this wasn't the issue - if the connection drops, we know it's an issue with the device token and report an error as such. A similar method might be a good way for you to check that this is, or is not, what's going on. Obviously this kills throughput and so we don't recommend it for a production environment.