Do Google Alerts pubsubhubub subscriptions stop 30 days after the listed expiration time?

I've successfully subscribed to a Google Alert feed using PubSubHubbub and the appspot hub and received updates to my callback regularly, but now the updates have stopped. I've verified the subscription is still valid using the Subscriber Diagnostics.

The updates stopped 30 days after the Expiration time in the Subscription Details. I did not specify lease_seconds in my original subscription request so the hub responded 432000 (5 days). According to the PubSubHubbub Core Working Draft, a recheck should have occurred after those 5 days, but I cannot find one in my logs.

Should I send another subscription request? Do I need to monitor rechecks and re-subscribe in the future if they don't c开发者_如何学JAVAome?

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Subscription requests are cheap... so you should do one anyway just to make sure. I make them at the half life of subscriptions no matter what.

And yes, if the re-verification doesn't happen you should proactively resubscribe when you can.

Also, you may want to check with the Google team that they don't have issue with their hub, or with the google alert feeds.