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503 error on 2019-10 REST api for inventory update

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Getting this error:

Run:Shopify: Synch Inventory was run on 9/8/2021 11:15:00 AM
Status:Failed (Enabled)
Message(s):Synch Inventory: The remote server returned an error: (503) Server Unavailable.

Seems to be inconsistent service on Shopify side.

Shopify Support strangely suggested that Shopify would consider fixing this if we posted a message here...

Reply 1 (1)
Shopify Staff
Shopify Staff
193 36 49

Hello @sgm407 ,

503s are an uncommon issue, however we do see them from time to time. In my experience, the most common reason behind an app encountering 503s is due to a throttle being applied. 

API calls are subject to rate-limiting, which means that only a certain amount of requests can be processed per minute. If an app attempts to exceed the rate maximum, or starts to exhibit bot-like behaviour, the IP/app can have a temporary throttle applied and the requests will be blocked from the server, resulting in a 503.

I would strongly recommend approaching your app developer and have them review their call rate. If the issue is intermittent rather than constant, and the error is 503, then it's a strong likelihood that their issue is automated temporary throttles on their app. They should be able to resolve this by reducing the call rate where necessary.



Graham S | API Support @ Shopify
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