Has anyone experienced duplicate requests sent to multiple EC2 instances using application load balancer?
We have an API on EC2 fronted by ALB and recently noticed that some requests are being sent to multiple instances and causing an issue as certain actions like payments are happening more than once.
The API is built around .net core, but don't think this is important. The issue started recently and it does not happen all the time.
Has anyone seen something like this. I have seen some older issues from around 2011/2012 but nothing more recent.