You may notice this error within the Integration Console error logging system within Google Checkout.  This is because Google requires a processing time of 3 seconds between start and finish and you must remove non-required headers/data to fulfill this need.  See below for the way to do this.

Cause: The connection with Google Checkout timing out

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You will probably notice that when you test out the process on your site (after doing the following: Google Checkout Shipping Issues) you get an error such as the following:

We timed out waiting for your server at—URL—the error we got is: Read timed out. Your server must respond faster to merchant calculation callback requests.

You can find this error within Google Checkout -> Tools -> Integration Console (assuming you enabled debugging within the Magento Admin for Google Checkout)

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A) Go back to Magento Admin… System -> Configuration -> Google API -> Google Checkout Shipping – Digital Delivery

- Enable Digital Delivery to NO
- Not sure why I had to do this…my assumption is that Magento sends digital delivery headers to Google to process every order even non-digital orders and this causes a minute delay that puts the processing over the required 3 second max that Google Checkout requires.

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B) System -> Configuration -> Google API -> Google Checkout

- Disable Default Tax Tables to YES
- Just one less thing that Magento has to send to Google thus speeding up the process.

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C) “Save Config” to save changes… Test again via your store by cliking “Google Checkout” in the cart and seeing if the shipping shows up.  It usually takes 1-3 seconds once the Google Checkout page loads for the shipping to actually load in the drop down.

Debug, Error, Google, Implementation, Issue, Payment, Time-out, Timeout