I have a Mendix application using IIS as a front facing server.
Intermittently users have been experiencing issues where triggering a microflow button results in an error. When checking this error in the browser console it looks like a 502 bad gateway error page HTML is being returned for the XmlHttpRequest to trigger the microflow.
The user gets a Generic: Connection Error message popup and no errors are logged to the Mendix console (makes sense because nothing failed server side if there is a connection error as nothing was triggered)
The Mendix console logs show that the sessions for the users were terminated and client access disabled for 300 seconds. Not sure it is related but it happens consistently around the time this issue is reported by the users.
Any assistance would be greatly appreciated, I wish I had more information.
Also are there any log nodes I can enable to get closer to the root cause without spamming log messages?