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 (Retired)
193 37 54

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.



To learn more visit the Shopify Help Center or the Community Blog.