Azure app service fails to read data from transport connection since the app service has been upgraded from D1 to S1 service plan.

Question

Hi All,

I have recently upgraded our azure app service to S1 service plan from D1. Since I upgraded it I am coming across lot of issues with the payment service we usually use to auto charge the customers based on the usage.

It works fine whenever I restart the service but after a while it fails to read the data from payment services, below is the error detail

"Exception Details : The SSL connection could not be established, see inner exception. Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host."

Also fails to send the push notifications: Issue at push notification sending for vehicle in :: The SSL connection could not be established, see inner exception.System.IO.IOException: Authentication failed because the remote party has closed the transport stream.

Please suggest how to overcome these issues

Thanks in advance

Answer 1

I advise starting with Troubleshooting intermittent outbound connection errors in Azure App Service - Azure App Service | Microsoft Learn @manoj gundlapalli .

However, since you stated that restarting your app service does temporarily mitigate your issue, it sounds like connection pooling issue. Use Diagnose and solve problems blade to collect network traffic as well as other tools that can help isolate your issue.