Private app stopped working

Shopify Apps
1

Hello,

we have a private app working since years.

Few days ago, we started to see random errors (on a given page) on the front : " There was an error in the third-party application." on per example https://www.livrenpoche.com/a/achat/livre/collection/3907/albin-michel-gf

After investigation on the server hosting the app, it turned out that :

  • when this error is displayed, there is no network packet received on the server (I used tcpdump for diagnosis).
  • when it works, I receive packets and see proper application logs

So it seems that Shopify’s proxy is not sending any request randomly.

I contacted Shopify Premium support, they “flushed the internal cache and re- imported the data from the app”.

Since this flush (yesterday), its even worse, now the error is permanent .

FYI My app url is https://shopify.livrenpoche.com:3000/a/achat/livre/auteur/3914/bernard-werber.

  • I checked ssl certificate, its valid including cert chain.

  • server is available, monitored, and no unusual load on it

  • I also tested on a test server used only by me, same result

Any hint?

2

Seems same issue is reported here (without any solution) https://community.shopify.com/topic/529794

This issue is clearly on Shopify side, and it seems they don’t do anything about it.

3

Finally it turned out that adding a port like :3000 is not supported anymore by shopify proxy.

https://shopify.livrenpoche.com:3000/a/achat/livre/auteur/3914/bernard-werber.

If I switch to standard https port 443 it works