The weird thing is that some assets do load and it’s not always the same that fail or succeed to load. But most times most assets fail and the app is never fully functional.
GET https://xxx/endpoint/fa9f9ec3-37d3-4013-a254-1d2d8b450dfc/shared/bootstrap/css/bootstrap.min.css net::ERR_ABORTED 503
There is a GitHub issue that describes the same behaviour:
If I change the load balancer to a “Classic Load Balancer” (which doesn’t support websockets), all assets load fine every time - except that the websockets connection fails. So there must be something specific about handling requests from the application load balancer that breaks things in undertow.
Also, it seems that this issue arose when the Shiny app became more complex and had to load more assets.
Has anyone solved this and/or could help me troubleshoot this?