CORS and concurrency

[mDomingues]

Hi guys,
I've been using echo for a while and its awesome. Congratz. 👍

My bundle has a front-end application that requests data from an API with echo. When the load of requests is too high, sometimes I receive a HTTP 502 error due a >> No 'Access-Control-Allow-Origin' header is present on the requested resource. <<
I use rs/cors middleware as found in the docs.

The headers are well-formed as it is supposed to be.
Between client and Go API there is a cloudflare-nginx server.

What are you're guess about this ? Has Echo any kind of issue regarding concurrent requests ? Like that ones "Response headers were already written" ?

I can reproduce this error if I kill the API service. Response from server is the same. It seems a concurrency problem..

Thank you so much for your help. :)

[vishr]

@mDomingues I doubt it to be an issue with Echo, do you want to try with standard http package and see?

[mDomingues]

You're right. I had a problem in my code that was panic'ing the server.
Sorry about this. Congratz for the work done with Echo :)
Many thanks.

[vishr]

Thanks!